diff --git a/lib/redmine_dmsf/webdav/dmsf_controller.rb b/lib/redmine_dmsf/webdav/dmsf_controller.rb
index 7a209538..796ca4c4 100644
--- a/lib/redmine_dmsf/webdav/dmsf_controller.rb
+++ b/lib/redmine_dmsf/webdav/dmsf_controller.rb
@@ -21,6 +21,7 @@
 
 module RedmineDmsf
   module Webdav
+    # DMSF controller
     class DmsfController < Dav4rack::Controller
       include Redmine::I18n
       include AbstractController::Callbacks