diff --git a/lib/doorkeeper/config.rb b/lib/doorkeeper/config.rb
index ff0645fac..7b2361137 100644
--- a/lib/doorkeeper/config.rb
+++ b/lib/doorkeeper/config.rb
@@ -406,8 +406,8 @@ def token_grant_types
     end
 
     def allow_blank_redirect_uri?
-      grant_flows.exclude?('authorization_code') &&
-        grant_flows.exclude?('implicit')
+      grant_flows.exclude?("authorization_code") &&
+        grant_flows.exclude?("implicit")
     end
 
     def option_defined?(name)
diff --git a/lib/generators/doorkeeper/application_owner_generator.rb b/lib/generators/doorkeeper/application_owner_generator.rb
index 0993a9b6f..4ce2a4799 100644
--- a/lib/generators/doorkeeper/application_owner_generator.rb
+++ b/lib/generators/doorkeeper/application_owner_generator.rb
@@ -4,6 +4,9 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Generates migration to add reference to owner of the
+  # Doorkeeper application.
+  #
   class ApplicationOwnerGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/confidential_applications_generator.rb b/lib/generators/doorkeeper/confidential_applications_generator.rb
index 487280754..3d2935d5e 100644
--- a/lib/generators/doorkeeper/confidential_applications_generator.rb
+++ b/lib/generators/doorkeeper/confidential_applications_generator.rb
@@ -4,6 +4,9 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Generates migration to add confidential column to Doorkeeper
+  # applications table.
+  #
   class ConfidentialApplicationsGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/install_generator.rb b/lib/generators/doorkeeper/install_generator.rb
index dac31e899..f169179e8 100644
--- a/lib/generators/doorkeeper/install_generator.rb
+++ b/lib/generators/doorkeeper/install_generator.rb
@@ -4,6 +4,8 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Setup doorkeeper into Rails application: locales, routes, etc.
+  #
   class InstallGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/migration_generator.rb b/lib/generators/doorkeeper/migration_generator.rb
index b607eaa0a..ac3223fcd 100644
--- a/lib/generators/doorkeeper/migration_generator.rb
+++ b/lib/generators/doorkeeper/migration_generator.rb
@@ -4,6 +4,8 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Copies main Doorkeeper migration into parent Rails application.
+  #
   class MigrationGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/pkce_generator.rb b/lib/generators/doorkeeper/pkce_generator.rb
index 86577767e..13c0614b2 100644
--- a/lib/generators/doorkeeper/pkce_generator.rb
+++ b/lib/generators/doorkeeper/pkce_generator.rb
@@ -4,6 +4,9 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Generates migration with PKCE required database columns for
+  # Doorkeeper tables.
+  #
   class PkceGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/previous_refresh_token_generator.rb b/lib/generators/doorkeeper/previous_refresh_token_generator.rb
index f9eeff87b..bfe54433f 100644
--- a/lib/generators/doorkeeper/previous_refresh_token_generator.rb
+++ b/lib/generators/doorkeeper/previous_refresh_token_generator.rb
@@ -4,6 +4,9 @@
 require "rails/generators/active_record"
 
 module Doorkeeper
+  # Generates migration to add previous refresh token column to the
+  # database for Doorkeeper tables.
+  #
   class PreviousRefreshTokenGenerator < ::Rails::Generators::Base
     include ::Rails::Generators::Migration
     source_root File.expand_path("templates", __dir__)
diff --git a/lib/generators/doorkeeper/views_generator.rb b/lib/generators/doorkeeper/views_generator.rb
index 16ccd0bea..ce379c1c1 100644
--- a/lib/generators/doorkeeper/views_generator.rb
+++ b/lib/generators/doorkeeper/views_generator.rb
@@ -2,6 +2,8 @@
 
 module Doorkeeper
   module Generators
+    # Generates doorkeeper views for Rails application
+    #
     class ViewsGenerator < ::Rails::Generators::Base
       source_root File.expand_path("../../../app/views", __dir__)