DataManager.Save should be virtual

SubstrateCS/Source/Data/BetaDataManager.cs

@@ -44,7 +44,7 @@ namespace Substrate.Data
             return _maps;
         }
 
-        public bool Save ()
+        public override bool Save ()
         {
             if (_world == null) {
                 return false;

SubstrateCS/Source/Data/DataManager.cs

@@ -38,7 +38,7 @@ namespace Substrate.Data
         /// Saves any metadata required by the world for managing data resources.
         /// </summary>
         /// <returns><c>true</c> on success, or <c>false</c> if data could not be saved.</returns>
-        public bool Save ()
+        public virtual bool Save ()
         {
             return true;
         }