diff --git a/src-cpp/app/boot/app_controller_delegate.h b/src-cpp/app/boot/app_controller_delegate.h
index eff5a52986..ccb849f2f2 100644
--- a/src-cpp/app/boot/app_controller_delegate.h
+++ b/src-cpp/app/boot/app_controller_delegate.h
@@ -1,22 +1,11 @@
 #pragma once
 
-#include <stdexcept>
-
 class AppControllerDelegate
 {
 public:
-	virtual void startupDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void startupDidLoad() = 0;
 
-	virtual void mainDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void mainDidLoad() = 0;
 
-	virtual void userLoggedIn()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void userLoggedIn() = 0;
 };
diff --git a/src-cpp/app/modules/main/controller.cpp b/src-cpp/app/modules/main/controller.cpp
index 47a53add1a..91d27ef003 100644
--- a/src-cpp/app/modules/main/controller.cpp
+++ b/src-cpp/app/modules/main/controller.cpp
@@ -7,9 +7,9 @@ namespace Modules
 {
 namespace Main
 {
-Controller::Controller(ModuleControllerDelegateInterface* d, QObject* parent)
+Controller::Controller(ModuleControllerDelegateInterface* delegate, QObject* parent)
 	: QObject(parent)
-	, m_delegate(d)
+	, m_delegate(delegate)
 { }
 
 void Controller::init() { }
diff --git a/src-cpp/app/modules/main/controller.h b/src-cpp/app/modules/main/controller.h
index 00f1bf13e9..7289b493d8 100644
--- a/src-cpp/app/modules/main/controller.h
+++ b/src-cpp/app/modules/main/controller.h
@@ -13,7 +13,7 @@ namespace Main
 class Controller : public QObject, ControllerInterface
 {
 public:
-	Controller(ModuleControllerDelegateInterface* d, QObject* parent = nullptr);
+	Controller(ModuleControllerDelegateInterface* delegate, QObject* parent = nullptr);
 	void init() override;
 
 private:
diff --git a/src-cpp/app/modules/main/controller_interface.h b/src-cpp/app/modules/main/controller_interface.h
index 86de8b2019..1a1d128120 100644
--- a/src-cpp/app/modules/main/controller_interface.h
+++ b/src-cpp/app/modules/main/controller_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Main
@@ -12,10 +10,7 @@ namespace Main
 class ControllerInterface
 {
 public:
-	virtual void init()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void init() = 0;
 };
 } // namespace Main
 } // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/main/interfaces/module_controller_delegate_interface.h b/src-cpp/app/modules/main/interfaces/module_controller_delegate_interface.h
index 23547cc56a..5c87094ae7 100644
--- a/src-cpp/app/modules/main/interfaces/module_controller_delegate_interface.h
+++ b/src-cpp/app/modules/main/interfaces/module_controller_delegate_interface.h
@@ -1,10 +1,5 @@
 #pragma once
 
-#include "accounts/service_interface.h"
-#include "app_controller_delegate.h"
-#include "controller.h"
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Main
diff --git a/src-cpp/app/modules/main/interfaces/module_view_delegate_interface.h b/src-cpp/app/modules/main/interfaces/module_view_delegate_interface.h
index d29f50f02f..110ba6fb77 100644
--- a/src-cpp/app/modules/main/interfaces/module_view_delegate_interface.h
+++ b/src-cpp/app/modules/main/interfaces/module_view_delegate_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Main
@@ -9,10 +7,7 @@ namespace Main
 class ModuleViewDelegateInterface
 {
 public:
-	virtual void viewDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void viewDidLoad() = 0;
 };
 }; // namespace Main
 }; // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/main/module.cpp b/src-cpp/app/modules/main/module.cpp
index 239f292a89..0017d414d1 100644
--- a/src-cpp/app/modules/main/module.cpp
+++ b/src-cpp/app/modules/main/module.cpp
@@ -11,10 +11,9 @@ namespace Modules
 {
 namespace Main
 {
-Module::Module(AppControllerDelegate* d)
-
+Module::Module(AppControllerDelegate* delegate)
+	: m_delegate(delegate)
 {
-	m_delegate = d;
 	m_controller = new Controller(this);
 	m_view = new View(this);
 }
diff --git a/src-cpp/app/modules/main/module.h b/src-cpp/app/modules/main/module.h
index 2aa12c1bb2..6169659baa 100644
--- a/src-cpp/app/modules/main/module.h
+++ b/src-cpp/app/modules/main/module.h
@@ -22,7 +22,7 @@ private:
 	Controller* m_controller;
 
 public:
-	Module(AppControllerDelegate* d);
+	Module(AppControllerDelegate* delegate);
 	~Module();
 	void load() override;
 	void checkIfModuleDidLoad();
diff --git a/src-cpp/app/modules/main/module_access_interface.h b/src-cpp/app/modules/main/module_access_interface.h
index 9325187312..e9202cb751 100644
--- a/src-cpp/app/modules/main/module_access_interface.h
+++ b/src-cpp/app/modules/main/module_access_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Main
@@ -9,10 +7,7 @@ namespace Main
 class ModuleAccessInterface
 {
 public:
-	virtual void load()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void load() = 0;
 };
 }; // namespace Main
 }; // namespace Modules
diff --git a/src-cpp/app/modules/main/view.cpp b/src-cpp/app/modules/main/view.cpp
index 2aeeaf8a99..b31833dd9b 100644
--- a/src-cpp/app/modules/main/view.cpp
+++ b/src-cpp/app/modules/main/view.cpp
@@ -7,11 +7,10 @@ namespace Modules
 namespace Main
 {
 
-View::View(ModuleViewDelegateInterface* d, QObject* parent)
+View::View(ModuleViewDelegateInterface* delegate, QObject* parent)
 	: QObject(parent)
-{
-	m_delegate = d;
-}
+	, m_delegate(delegate)
+{ }
 
 void View::load()
 {
diff --git a/src-cpp/app/modules/main/view.h b/src-cpp/app/modules/main/view.h
index 0c6f8c286b..93cced9695 100644
--- a/src-cpp/app/modules/main/view.h
+++ b/src-cpp/app/modules/main/view.h
@@ -13,7 +13,7 @@ class View : public QObject
 	Q_OBJECT
 
 public:
-	explicit View(ModuleViewDelegateInterface* d, QObject* parent = nullptr);
+	explicit View(ModuleViewDelegateInterface* delegate, QObject* parent = nullptr);
 	void load();
 
 private:
diff --git a/src-cpp/app/modules/startup/controller.cpp b/src-cpp/app/modules/startup/controller.cpp
index 2787f71a48..5a3e28b1a1 100644
--- a/src-cpp/app/modules/startup/controller.cpp
+++ b/src-cpp/app/modules/startup/controller.cpp
@@ -8,12 +8,12 @@ namespace Modules
 {
 namespace Startup
 {
-Controller::Controller(ModuleControllerDelegateInterface* d,
+Controller::Controller(ModuleControllerDelegateInterface* delegate,
 					   Accounts::ServiceInterface* accountsService,
 					   QObject* parent)
 	: QObject(parent)
 	, m_accountsService(accountsService)
-	, m_delegate(d)
+	, m_delegate(delegate)
 { }
 
 void Controller::init()
diff --git a/src-cpp/app/modules/startup/controller.h b/src-cpp/app/modules/startup/controller.h
index e90c1432fb..b23660aa60 100644
--- a/src-cpp/app/modules/startup/controller.h
+++ b/src-cpp/app/modules/startup/controller.h
@@ -14,7 +14,7 @@ namespace Startup
 class Controller : public QObject, ControllerInterface
 {
 public:
-	Controller(ModuleControllerDelegateInterface* d,
+	Controller(ModuleControllerDelegateInterface* delegate,
 			   Accounts::ServiceInterface* accountsService,
 			   QObject* parent = nullptr);
 	void init() override;
diff --git a/src-cpp/app/modules/startup/controller_interface.h b/src-cpp/app/modules/startup/controller_interface.h
index ee6b80b7ed..bd8cd443d3 100644
--- a/src-cpp/app/modules/startup/controller_interface.h
+++ b/src-cpp/app/modules/startup/controller_interface.h
@@ -10,14 +10,9 @@ namespace Startup
 class ControllerInterface
 {
 public:
-	virtual void init()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual bool shouldStartWithOnboardingScreen()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void init() = 0;
+
+	virtual bool shouldStartWithOnboardingScreen() = 0;
 };
 } // namespace Startup
 } // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/startup/interfaces/module_controller_delegate_interface.h b/src-cpp/app/modules/startup/interfaces/module_controller_delegate_interface.h
index 59c9a8ab07..9219eec456 100644
--- a/src-cpp/app/modules/startup/interfaces/module_controller_delegate_interface.h
+++ b/src-cpp/app/modules/startup/interfaces/module_controller_delegate_interface.h
@@ -1,10 +1,5 @@
 #pragma once
 
-#include "accounts/service_interface.h"
-#include "app_controller_delegate.h"
-#include "controller.h"
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -12,15 +7,9 @@ namespace Startup
 class ModuleControllerDelegateInterface
 {
 public:
-	virtual void userLoggedIn()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void userLoggedIn() = 0;
 
-	virtual void emitLogOut()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void emitLogOut() = 0;
 };
 }; // namespace Startup
 }; // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/startup/interfaces/module_login_delegate_interface.h b/src-cpp/app/modules/startup/interfaces/module_login_delegate_interface.h
index d4eb2268ea..9888b3b554 100644
--- a/src-cpp/app/modules/startup/interfaces/module_login_delegate_interface.h
+++ b/src-cpp/app/modules/startup/interfaces/module_login_delegate_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -9,10 +7,7 @@ namespace Startup
 class ModuleLoginDelegateInterface
 {
 public:
-	virtual void loginDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void loginDidLoad() = 0;
 };
 }; // namespace Startup
 }; // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/startup/interfaces/module_onboarding_delegate_interface.h b/src-cpp/app/modules/startup/interfaces/module_onboarding_delegate_interface.h
index 4e24fd9e8e..586ce75446 100644
--- a/src-cpp/app/modules/startup/interfaces/module_onboarding_delegate_interface.h
+++ b/src-cpp/app/modules/startup/interfaces/module_onboarding_delegate_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -9,10 +7,7 @@ namespace Startup
 class ModuleOnboardingDelegateInterface
 {
 public:
-	virtual void onboardingDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void onboardingDidLoad() = 0;
 };
 }; // namespace Startup
 }; // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/startup/interfaces/module_view_delegate_interface.h b/src-cpp/app/modules/startup/interfaces/module_view_delegate_interface.h
index fac1ef1e3f..459ef56729 100644
--- a/src-cpp/app/modules/startup/interfaces/module_view_delegate_interface.h
+++ b/src-cpp/app/modules/startup/interfaces/module_view_delegate_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -9,10 +7,7 @@ namespace Startup
 class ModuleViewDelegateInterface
 {
 public:
-	virtual void viewDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void viewDidLoad() = 0;
 };
 }; // namespace Startup
 }; // namespace Modules
\ No newline at end of file
diff --git a/src-cpp/app/modules/startup/login/controller.cpp b/src-cpp/app/modules/startup/login/controller.cpp
index 09f58951c7..dc1ca3f3f1 100644
--- a/src-cpp/app/modules/startup/login/controller.cpp
+++ b/src-cpp/app/modules/startup/login/controller.cpp
@@ -13,13 +13,13 @@ namespace Startup
 {
 namespace Login
 {
-Controller::Controller(ModuleControllerDelegateInterface* d,
+Controller::Controller(ModuleControllerDelegateInterface* delegate,
 					   // keychainService
 					   Accounts::ServiceInterface* accountsService,
 					   QObject* parent)
 	: QObject(parent)
 	, m_accountsService(accountsService)
-	, m_delegate(d)
+	, m_delegate(delegate)
 { }
 
 void Controller::init()
diff --git a/src-cpp/app/modules/startup/login/controller.h b/src-cpp/app/modules/startup/login/controller.h
index b6203e9fdf..05d69dbbe8 100644
--- a/src-cpp/app/modules/startup/login/controller.h
+++ b/src-cpp/app/modules/startup/login/controller.h
@@ -19,7 +19,7 @@ class Controller : public QObject, ControllerInterface
 	Q_OBJECT
 
 public:
-	Controller(ModuleControllerDelegateInterface* d,
+	Controller(ModuleControllerDelegateInterface* delegate,
 			   // keychainService,
 			   Accounts::ServiceInterface* accountsService,
 			   QObject* parent = nullptr);
diff --git a/src-cpp/app/modules/startup/login/controller_interface.h b/src-cpp/app/modules/startup/login/controller_interface.h
index 0d1c1c0f4d..47bd931d5d 100644
--- a/src-cpp/app/modules/startup/login/controller_interface.h
+++ b/src-cpp/app/modules/startup/login/controller_interface.h
@@ -14,22 +14,13 @@ namespace Login
 class ControllerInterface
 {
 public:
-	virtual void init()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual QVector<Accounts::AccountDto> getOpenedAccounts()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual void setSelectedAccountKeyUid(QString keyUid)
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual void login(QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void init() = 0;
+
+	virtual QVector<Accounts::AccountDto> getOpenedAccounts() = 0;
+
+	virtual void setSelectedAccountKeyUid(QString keyUid) = 0;
+
+	virtual void login(QString password) = 0;
 };
 } // namespace Login
 } // namespace Startup
diff --git a/src-cpp/app/modules/startup/login/interfaces/module_controller_delegate_interface.h b/src-cpp/app/modules/startup/login/interfaces/module_controller_delegate_interface.h
index 821be14cb3..f9d169f3d0 100644
--- a/src-cpp/app/modules/startup/login/interfaces/module_controller_delegate_interface.h
+++ b/src-cpp/app/modules/startup/login/interfaces/module_controller_delegate_interface.h
@@ -1,10 +1,5 @@
 #pragma once
 
-#include "accounts/service_interface.h"
-#include "app_controller_delegate.h"
-#include "controller.h"
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -14,20 +9,11 @@ namespace Login
 class ModuleControllerDelegateInterface
 {
 public:
-	virtual void emitAccountLoginError(QString error)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void emitAccountLoginError(QString error) = 0;
 
-	virtual void emitObtainingPasswordError(QString errorDescription)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void emitObtainingPasswordError(QString errorDescription) = 0;
 
-	virtual void emitObtainingPasswordSuccess(QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void emitObtainingPasswordSuccess(QString password) = 0;
 };
 }; // namespace Login
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/login/interfaces/module_view_delegate_interface.h b/src-cpp/app/modules/startup/login/interfaces/module_view_delegate_interface.h
index df767fc247..678df2d235 100644
--- a/src-cpp/app/modules/startup/login/interfaces/module_view_delegate_interface.h
+++ b/src-cpp/app/modules/startup/login/interfaces/module_view_delegate_interface.h
@@ -1,7 +1,6 @@
 #pragma once
 #include "../item.h"
 #include <QString>
-#include <stdexcept>
 
 namespace Modules
 {
@@ -12,20 +11,11 @@ namespace Login
 class ModuleViewDelegateInterface
 {
 public:
-	virtual void viewDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void viewDidLoad() = 0;
 
-	virtual void setSelectedAccount(Item item)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void setSelectedAccount(Item item) = 0;
 
-	virtual void login(QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void login(QString password) = 0;
 };
 }; // namespace Login
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/login/module.cpp b/src-cpp/app/modules/startup/login/module.cpp
index 1dc7eae00e..d042e1f155 100644
--- a/src-cpp/app/modules/startup/login/module.cpp
+++ b/src-cpp/app/modules/startup/login/module.cpp
@@ -17,11 +17,11 @@ namespace Startup
 {
 namespace Login
 {
-Module::Module(Modules::Startup::ModuleLoginDelegateInterface* d,
+Module::Module(Modules::Startup::ModuleLoginDelegateInterface* delegate,
 			   // keychainService
 			   Accounts::ServiceInterface* accountsService)
+	: m_delegate(delegate)
 {
-	m_delegate = d;
 	m_controller = new Controller(this, accountsService);
 	m_view = new View(this);
 	m_moduleLoaded = false;
@@ -33,7 +33,7 @@ Module::~Module()
 	delete m_view;
 }
 
-void Module::extractImages(Accounts::AccountDto account, QString &thumbnailImage, QString &largeImage)
+void Module::extractImages(Accounts::AccountDto account, QString& thumbnailImage, QString& largeImage)
 {
 	foreach(const Accounts::Image& img, account.images)
 	{
diff --git a/src-cpp/app/modules/startup/login/module.h b/src-cpp/app/modules/startup/login/module.h
index dce1964ec7..06025002d4 100644
--- a/src-cpp/app/modules/startup/login/module.h
+++ b/src-cpp/app/modules/startup/login/module.h
@@ -26,7 +26,7 @@ private:
 	bool m_moduleLoaded;
 
 public:
-	Module(Modules::Startup::ModuleLoginDelegateInterface* d,
+	Module(Modules::Startup::ModuleLoginDelegateInterface* delegate,
 		   // keychainService
 		   Accounts::ServiceInterface* accountsService);
 	~Module();
diff --git a/src-cpp/app/modules/startup/login/module_access_interface.h b/src-cpp/app/modules/startup/login/module_access_interface.h
index 9d6d2703cf..389a2cd7ce 100644
--- a/src-cpp/app/modules/startup/login/module_access_interface.h
+++ b/src-cpp/app/modules/startup/login/module_access_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -11,15 +9,9 @@ namespace Login
 class ModuleAccessInterface
 {
 public:
-	virtual void load()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void load() = 0;
 
-	virtual bool isLoaded()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool isLoaded() = 0;
 };
 }; // namespace Login
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/login/view.cpp b/src-cpp/app/modules/startup/login/view.cpp
index b29e37317b..a3351962a2 100644
--- a/src-cpp/app/modules/startup/login/view.cpp
+++ b/src-cpp/app/modules/startup/login/view.cpp
@@ -11,10 +11,10 @@ namespace Startup
 {
 namespace Login
 {
-View::View(ModuleViewDelegateInterface* d, QObject* parent)
+View::View(ModuleViewDelegateInterface* delegate, QObject* parent)
 	: QObject(parent)
+	, m_delegate(delegate)
 {
-	m_delegate = d;
 	m_model = new Model();
 	m_selectedAccount = new SelectedAccount();
 }
diff --git a/src-cpp/app/modules/startup/login/view.h b/src-cpp/app/modules/startup/login/view.h
index 6d959490af..ae749c0a11 100644
--- a/src-cpp/app/modules/startup/login/view.h
+++ b/src-cpp/app/modules/startup/login/view.h
@@ -21,7 +21,7 @@ class View : public QObject
 	Q_PROPERTY(Model* accountsModel READ getModel NOTIFY modelChanged)
 
 public:
-	explicit View(ModuleViewDelegateInterface* d, QObject* parent = nullptr);
+	explicit View(ModuleViewDelegateInterface* delegate, QObject* parent = nullptr);
 	~View();
 	void load();
 
diff --git a/src-cpp/app/modules/startup/module.cpp b/src-cpp/app/modules/startup/module.cpp
index 0c466496c3..35ff3b99ae 100644
--- a/src-cpp/app/modules/startup/module.cpp
+++ b/src-cpp/app/modules/startup/module.cpp
@@ -14,12 +14,11 @@ namespace Modules
 {
 namespace Startup
 {
-Module::Module(AppControllerDelegate* d,
+Module::Module(AppControllerDelegate* delegate,
 			   /*keychainService,*/
 			   Accounts::ServiceInterface* accountsService)
-
+	: m_delegate(delegate)
 {
-	m_delegate = d;
 	m_controller = new Controller(this, accountsService);
 	m_view = new View(this);
 
diff --git a/src-cpp/app/modules/startup/module.h b/src-cpp/app/modules/startup/module.h
index 14d97c35cd..52ec026b2e 100644
--- a/src-cpp/app/modules/startup/module.h
+++ b/src-cpp/app/modules/startup/module.h
@@ -32,7 +32,7 @@ private:
 	Modules::Startup::Login::ModuleAccessInterface* m_loginModule;
 
 public:
-	Module(AppControllerDelegate* d,
+	Module(AppControllerDelegate* delegate,
 		   /*keychainService,*/ Accounts::ServiceInterface* accountsService);
 	~Module();
 	void load() override;
diff --git a/src-cpp/app/modules/startup/module_access_interface.h b/src-cpp/app/modules/startup/module_access_interface.h
index 8ded7fc7fa..1aec7bb407 100644
--- a/src-cpp/app/modules/startup/module_access_interface.h
+++ b/src-cpp/app/modules/startup/module_access_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -9,15 +7,9 @@ namespace Startup
 class ModuleAccessInterface
 {
 public:
-	virtual void load()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void load() = 0;
 
-    virtual void moveToAppState()
-	{
-		throw std::domain_error("Not implemented");
-	}
+    virtual void moveToAppState() = 0;
 };
 }; // namespace Startup
 }; // namespace Modules
diff --git a/src-cpp/app/modules/startup/onboarding/controller.cpp b/src-cpp/app/modules/startup/onboarding/controller.cpp
index a15552c9c4..f66e127312 100644
--- a/src-cpp/app/modules/startup/onboarding/controller.cpp
+++ b/src-cpp/app/modules/startup/onboarding/controller.cpp
@@ -13,12 +13,12 @@ namespace Startup
 {
 namespace Onboarding
 {
-Controller::Controller(ModuleControllerDelegateInterface* d,
+Controller::Controller(ModuleControllerDelegateInterface* delegate,
 					   Accounts::ServiceInterface* accountsService,
 					   QObject* parent)
 	: QObject(parent)
 	, m_accountsService(accountsService)
-	, m_delegate(d)
+	, m_delegate(delegate)
 { }
 
 void Controller::init()
diff --git a/src-cpp/app/modules/startup/onboarding/controller.h b/src-cpp/app/modules/startup/onboarding/controller.h
index e48d14be82..cd9844c508 100644
--- a/src-cpp/app/modules/startup/onboarding/controller.h
+++ b/src-cpp/app/modules/startup/onboarding/controller.h
@@ -19,7 +19,7 @@ class Controller : public QObject, ControllerInterface
 	Q_OBJECT
 
 public:
-	Controller(ModuleControllerDelegateInterface* d,
+	Controller(ModuleControllerDelegateInterface* delegate,
 			   Accounts::ServiceInterface* accountsService,
 			   QObject* parent = nullptr);
 	void init() override;
diff --git a/src-cpp/app/modules/startup/onboarding/controller_interface.h b/src-cpp/app/modules/startup/onboarding/controller_interface.h
index 1a236c2a4a..3b01acffa6 100644
--- a/src-cpp/app/modules/startup/onboarding/controller_interface.h
+++ b/src-cpp/app/modules/startup/onboarding/controller_interface.h
@@ -14,34 +14,19 @@ namespace Onboarding
 class ControllerInterface
 {
 public:
-	virtual void init()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual QVector<Accounts::GeneratedAccountDto> getGeneratedAccounts()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual void setSelectedAccountByIndex(int index)
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual void storeSelectedAccountAndLogin(QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual Accounts::GeneratedAccountDto getImportedAccount()
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual QString validateMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
-	virtual void importMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void init() = 0;
+	
+	virtual QVector<Accounts::GeneratedAccountDto> getGeneratedAccounts() = 0;
+	
+	virtual void setSelectedAccountByIndex(int index) = 0;
+	
+	virtual void storeSelectedAccountAndLogin(QString password) = 0;
+	
+	virtual Accounts::GeneratedAccountDto getImportedAccount() = 0;
+	
+	virtual QString validateMnemonic(QString mnemonic) = 0;
+	
+	virtual void importMnemonic(QString mnemonic) = 0;
 };
 } // namespace Onboarding
 } // namespace Startup
diff --git a/src-cpp/app/modules/startup/onboarding/interfaces/module_controller_delegate_interface.h b/src-cpp/app/modules/startup/onboarding/interfaces/module_controller_delegate_interface.h
index 030237bdc4..340bf87932 100644
--- a/src-cpp/app/modules/startup/onboarding/interfaces/module_controller_delegate_interface.h
+++ b/src-cpp/app/modules/startup/onboarding/interfaces/module_controller_delegate_interface.h
@@ -1,10 +1,5 @@
 #pragma once
 
-#include "accounts/service_interface.h"
-#include "app_controller_delegate.h"
-#include "controller.h"
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -14,20 +9,11 @@ namespace Onboarding
 class ModuleControllerDelegateInterface
 {
 public:
-	virtual void setupAccountError()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void setupAccountError() = 0;
 
-	virtual void importAccountError()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void importAccountError() = 0;
 
-	virtual void importAccountSuccess()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void importAccountSuccess() = 0;
 };
 }; // namespace Onboarding
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/onboarding/interfaces/module_view_delegate_interface.h b/src-cpp/app/modules/startup/onboarding/interfaces/module_view_delegate_interface.h
index 6f8199a627..efcb1579be 100644
--- a/src-cpp/app/modules/startup/onboarding/interfaces/module_view_delegate_interface.h
+++ b/src-cpp/app/modules/startup/onboarding/interfaces/module_view_delegate_interface.h
@@ -1,7 +1,6 @@
 #pragma once
 #include "accounts/generated_account.h"
 #include <QString>
-#include <stdexcept>
 
 namespace Modules
 {
@@ -12,35 +11,17 @@ namespace Onboarding
 class ModuleViewDelegateInterface
 {
 public:
-	virtual void viewDidLoad()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void viewDidLoad() = 0;
 
-	virtual void setSelectedAccountByIndex(int index)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void setSelectedAccountByIndex(int index) = 0;
 
-	virtual void storeSelectedAccountAndLogin(QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void storeSelectedAccountAndLogin(QString password) = 0;
 
-	virtual Accounts::GeneratedAccountDto getImportedAccount()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual Accounts::GeneratedAccountDto getImportedAccount() = 0;
 
-	virtual QString validateMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QString validateMnemonic(QString mnemonic) = 0;
 
-	virtual void importMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void importMnemonic(QString mnemonic) = 0;
 };
 }; // namespace Onboarding
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/onboarding/module.cpp b/src-cpp/app/modules/startup/onboarding/module.cpp
index fe341b9f71..6961bf54ab 100644
--- a/src-cpp/app/modules/startup/onboarding/module.cpp
+++ b/src-cpp/app/modules/startup/onboarding/module.cpp
@@ -1,14 +1,14 @@
 #include "module.h"
+#include "../interfaces/module_onboarding_delegate_interface.h"
 #include "accounts/generated_account.h"
 #include "accounts/service_interface.h"
-#include "../interfaces/module_onboarding_delegate_interface.h"
 #include "controller.h"
 #include "singleton.h"
 #include "view.h"
+#include <QDebug>
 #include <QObject>
 #include <QQmlContext>
 #include <QVariant>
-#include <QDebug>
 #include <iostream>
 
 namespace Modules
@@ -17,9 +17,10 @@ namespace Startup
 {
 namespace Onboarding
 {
-Module::Module(Modules::Startup::ModuleOnboardingDelegateInterface* d, Accounts::ServiceInterface* accountsService)
+Module::Module(Modules::Startup::ModuleOnboardingDelegateInterface* delegate,
+			   Accounts::ServiceInterface* accountsService)
+	: m_delegate(delegate)
 {
-	m_delegate = d;
 	m_controller = new Controller(this, accountsService);
 	m_view = new View(this);
 	m_moduleLoaded = false;
diff --git a/src-cpp/app/modules/startup/onboarding/module.h b/src-cpp/app/modules/startup/onboarding/module.h
index 6637d9fde2..b054e544ba 100644
--- a/src-cpp/app/modules/startup/onboarding/module.h
+++ b/src-cpp/app/modules/startup/onboarding/module.h
@@ -25,7 +25,7 @@ private:
 	bool m_moduleLoaded;
 
 public:
-	Module(Modules::Startup::ModuleOnboardingDelegateInterface* d, Accounts::ServiceInterface* accountsService);
+	Module(Modules::Startup::ModuleOnboardingDelegateInterface* delegate, Accounts::ServiceInterface* accountsService);
 	~Module();
 	void load() override;
 	bool isLoaded() override;
diff --git a/src-cpp/app/modules/startup/onboarding/module_access_interface.h b/src-cpp/app/modules/startup/onboarding/module_access_interface.h
index 1627196bf0..22ef8cc13f 100644
--- a/src-cpp/app/modules/startup/onboarding/module_access_interface.h
+++ b/src-cpp/app/modules/startup/onboarding/module_access_interface.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stdexcept>
-
 namespace Modules
 {
 namespace Startup
@@ -11,15 +9,9 @@ namespace Onboarding
 class ModuleAccessInterface
 {
 public:
-	virtual void load()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void load() = 0;
 
-	virtual bool isLoaded()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool isLoaded() = 0;
 };
 }; // namespace Onboarding
 }; // namespace Startup
diff --git a/src-cpp/app/modules/startup/onboarding/view.cpp b/src-cpp/app/modules/startup/onboarding/view.cpp
index 79c317767c..9114526733 100644
--- a/src-cpp/app/modules/startup/onboarding/view.cpp
+++ b/src-cpp/app/modules/startup/onboarding/view.cpp
@@ -1,7 +1,7 @@
 #include "view.h"
 #include "interfaces/module_view_delegate_interface.h"
-#include <QObject>
 #include <QDebug>
+#include <QObject>
 
 namespace Modules
 {
@@ -9,10 +9,10 @@ namespace Startup
 {
 namespace Onboarding
 {
-View::View(ModuleViewDelegateInterface* d, QObject* parent)
+View::View(ModuleViewDelegateInterface* delegate, QObject* parent)
 	: QObject(parent)
+	, m_delegate(delegate)
 {
-	m_delegate = d;
 	m_model = new Model();
 }
 
diff --git a/src-cpp/app/modules/startup/onboarding/view.h b/src-cpp/app/modules/startup/onboarding/view.h
index 8665a16934..468b5221ed 100644
--- a/src-cpp/app/modules/startup/onboarding/view.h
+++ b/src-cpp/app/modules/startup/onboarding/view.h
@@ -22,7 +22,7 @@ class View : public QObject
 	Q_PROPERTY(QString importedAccountAddress READ getImportedAccountAddress NOTIFY importedAccountChanged)
 
 public:
-	explicit View(ModuleViewDelegateInterface* d, QObject* parent = nullptr);
+	explicit View(ModuleViewDelegateInterface* delegate, QObject* parent = nullptr);
 	~View();
 	void load();
 
diff --git a/src-cpp/app/modules/startup/view.cpp b/src-cpp/app/modules/startup/view.cpp
index d2557dbd48..8a385602cf 100644
--- a/src-cpp/app/modules/startup/view.cpp
+++ b/src-cpp/app/modules/startup/view.cpp
@@ -7,12 +7,11 @@ namespace Modules
 namespace Startup
 {
 
-View::View(ModuleViewDelegateInterface* d, QObject* parent)
+View::View(ModuleViewDelegateInterface* delegate, QObject* parent)
 	: QObject(parent)
 	, m_appState(AppState::OnboardingState)
-{
-	m_delegate = d;
-}
+	, m_delegate(delegate)
+{ }
 
 void View::load()
 {
diff --git a/src-cpp/app/modules/startup/view.h b/src-cpp/app/modules/startup/view.h
index edd6854fa4..ba4fb43e21 100644
--- a/src-cpp/app/modules/startup/view.h
+++ b/src-cpp/app/modules/startup/view.h
@@ -21,7 +21,7 @@ class View : public QObject
 	Q_PROPERTY(int appState READ getAppState NOTIFY appStateChanged)
 
 public:
-	explicit View(ModuleViewDelegateInterface* d, QObject* parent = nullptr);
+	explicit View(ModuleViewDelegateInterface* delegate, QObject* parent = nullptr);
 	void emitLogOut();
 	void setAppState(AppState state);
 	void load();
diff --git a/src-cpp/app_service/include/accounts/service_interface.h b/src-cpp/app_service/include/accounts/service_interface.h
index 50ca24da42..467cef37ce 100644
--- a/src-cpp/app_service/include/accounts/service_interface.h
+++ b/src-cpp/app_service/include/accounts/service_interface.h
@@ -6,7 +6,6 @@
 #include <QJsonValue>
 #include <QString>
 #include <QVector>
-#include <stdexcept>
 
 namespace Accounts
 {
@@ -14,70 +13,31 @@ namespace Accounts
 class ServiceInterface : public AppService
 {
 public:
-	virtual QVector<AccountDto> openedAccounts()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QVector<AccountDto> openedAccounts() = 0;
 
-	virtual QVector<GeneratedAccountDto> generatedAccounts()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QVector<GeneratedAccountDto> generatedAccounts() = 0;
 
-	virtual bool setupAccount(QString accountId, QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool setupAccount(QString accountId, QString password) = 0;
 
-	virtual AccountDto getLoggedInAccount()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual AccountDto getLoggedInAccount() = 0;
 
-	virtual GeneratedAccountDto getImportedAccount()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual GeneratedAccountDto getImportedAccount() = 0;
 
-	virtual bool isFirstTimeAccountLogin()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool isFirstTimeAccountLogin() = 0;
 
-	virtual QString validateMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QString validateMnemonic(QString mnemonic) = 0;
 
-	virtual bool importMnemonic(QString mnemonic)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool importMnemonic(QString mnemonic) = 0;
 
-	virtual QString login(AccountDto account, QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QString login(AccountDto account, QString password) = 0;
 
-	virtual void clear()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void clear() = 0;
 
-	virtual QString generateAlias(QString publicKey)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QString generateAlias(QString publicKey) = 0;
 
-	virtual QString generateIdenticon(QString publicKey)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual QString generateIdenticon(QString publicKey) = 0;
 
-	virtual bool verifyAccountPassword(QString account, QString password)
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual bool verifyAccountPassword(QString account, QString password) = 0;
 };
 
 } // namespace Accounts
\ No newline at end of file
diff --git a/src-cpp/app_service/include/app_service.h b/src-cpp/app_service/include/app_service.h
index d015e2960d..36897216c1 100644
--- a/src-cpp/app_service/include/app_service.h
+++ b/src-cpp/app_service/include/app_service.h
@@ -1,12 +1,7 @@
 #pragma once
 
-#include <stdexcept>
-
 class AppService
 {
 public:
-	virtual void init()
-	{
-		throw std::domain_error("Not implemented");
-	}
+	virtual void init() = 0;
 };