1 files changed, 13 insertions, 2 deletions
diff --git a/win/CS/HandBrakeWPF/ViewModels/ViewModelBase.cs b/win/CS/HandBrakeWPF/ViewModels/ViewModelBase.cs
index cc2d9307a..eea335d84 100644
--- a/win/CS/HandBrakeWPF/ViewModels/ViewModelBase.cs
+++ b/win/CS/HandBrakeWPF/ViewModels/ViewModelBase.cs
@@ -1,11 +1,22 @@
-namespace HandBrakeWPF.ViewModels
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="ViewModelBase.cs" company="HandBrake Project (http://handbrake.fr)">
+//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
+// </copyright>
+// <summary>
+//   A Base Class for the View Models which contains reusable code.
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace HandBrakeWPF.ViewModels
 {
     using Caliburn.Micro;
 
+    using HandBrakeWPF.ViewModels.Interfaces;
+
     /// <summary>
     /// A Base Class for the View Models which contains reusable code.
     /// </summary>
-    public class ViewModelBase : Screen
+    public class ViewModelBase : Screen, IViewModelBase
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ViewModelBase"/> class.