diff --git a/src/main/scala/plugin/Security.scala b/src/main/scala/plugin/Security.scala
index 8295351..c409020 100644
--- a/src/main/scala/plugin/Security.scala
+++ b/src/main/scala/plugin/Security.scala
@@ -1,11 +1,36 @@
 package plugin
 
+/**
+ * Defines enum case classes to specify permission for actions which is provided by plugin.
+ */
 object Security {
+
   sealed trait Security
+
+  /**
+   * All users and guests
+   */
   case class All() extends Security
+
+  /**
+   * Only signed-in users
+   */
   case class Login() extends Security
+
+  /**
+   * Only repository owner and collaborators
+   */
   case class Member() extends Security
+
+  /**
+   * Only repository owner and managers of group repository
+   */
   case class Owner() extends Security
+
+  /**
+   * Only administrators
+   */
   case class Admin() extends Security
+
 }