diff --git a/src/database.rs b/src/database.rs
index 833eeff..1aefb45 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -4,12 +4,16 @@ use crate::*;
 pub trait Database {
     /// Creates new instance of db
     fn new(dbpath: &str) -> Self;
+
     /// Loades existing db (existence check required)
     fn load(dbpath: &str) -> Self;
+
     /// Returns value from db by the key
     fn get(&self, key: DBKey) -> Result<Option<Value>>;
+
     /// Puts the value to the db by the key
     fn put(&mut self, key: DBKey, value: Value) -> Result<()>;
+
     /// Deletes the key from db
     fn delete(&mut self, key: DBKey) -> Result<()>;
 }
diff --git a/src/hasher.rs b/src/hasher.rs
index 2cc08cb..4368e91 100644
--- a/src/hasher.rs
+++ b/src/hasher.rs
@@ -7,8 +7,10 @@ pub trait Hasher {
 
     /// Creates new hash-function instance
     fn new() -> Self;
+
     /// Outputs the default leaf (Fr::default())
     fn default_leaf() -> Self::Fr;
+
     /// Calculates hash-function
     fn hash(input: &[Self::Fr]) -> Self::Fr;
 }