added user data save event

MediaBrowser.Controller/Library/IUserDataManager.cs

@@ -11,6 +11,11 @@ namespace MediaBrowser.Controller.Library
     /// </summary>
     public interface IUserDataManager
     {
+        /// <summary>
+        /// Occurs when [user data saved].
+        /// </summary>
+        event EventHandler<UserDataSaveEventArgs> UserDataSaved;
+
         /// <summary>
         /// Saves the user data.
         /// </summary>

MediaBrowser.Controller/Library/UserDataSaveEventArgs.cs

@@ -0,0 +1,36 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Entities;
+using System;
+
+namespace MediaBrowser.Controller.Library
+{
+    /// <summary>
+    /// Class UserDataSaveEventArgs
+    /// </summary>
+    public class UserDataSaveEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Gets or sets the user id.
+        /// </summary>
+        /// <value>The user id.</value>
+        public Guid UserId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the key.
+        /// </summary>
+        /// <value>The key.</value>
+        public string Key { get; set; }
+
+        /// <summary>
+        /// Gets or sets the save reason.
+        /// </summary>
+        /// <value>The save reason.</value>
+        public UserDataSaveReason SaveReason { get; set; }
+
+        /// <summary>
+        /// Gets or sets the user data.
+        /// </summary>
+        /// <value>The user data.</value>
+        public UserItemData UserData { get; set; }
+    }
+}