- Add Dispose method to IRegionDataStore

- Add necessary dummy Dispose-methods where they are missing
- Implement the SQLite Dispose-methods
(currently only used for unit tests, in the next commit)

OpenSim/Data/SQLite/SQLiteInventoryStore.cs

@@ -46,6 +46,7 @@ namespace OpenSim.Data.SQLite
         private const string invItemsSelect = "select * from inventoryitems";
         private const string invFoldersSelect = "select * from inventoryfolders";
 
+        private SqliteConnection conn;
         private DataSet ds;
         private SqliteDataAdapter invItemsDa;
         private SqliteDataAdapter invFoldersDa;
@@ -71,7 +72,7 @@ namespace OpenSim.Data.SQLite
                 dbconnect = "URI=file:inventoryStore.db,version=3";
             }
             m_log.Info("[INVENTORY DB]: Sqlite - connecting: " + dbconnect);
-            SqliteConnection conn = new SqliteConnection(dbconnect);
+            conn = new SqliteConnection(dbconnect);
 
             conn.Open();
 
@@ -101,6 +102,29 @@ namespace OpenSim.Data.SQLite
             ds.AcceptChanges();
         }
 
+        /// <summary>
+        /// Closes the inventory interface
+        /// </summary>
+        public void Dispose()
+        {
+            if(conn != null) {
+                conn.Close();
+                conn = null;
+            }
+            if(invItemsDa != null) {
+                invItemsDa.Dispose();
+                invItemsDa = null;
+            }
+            if(invFoldersDa != null) {
+                invFoldersDa.Dispose();
+                invFoldersDa = null;
+            }
+            if(ds != null) {
+                ds.Dispose();
+                ds = null;
+            }
+        }
+
         /// <summary>
         ///
         /// </summary>
@@ -277,13 +301,6 @@ namespace OpenSim.Data.SQLite
             // TODO: DataSet commit
         }
 
-        /// <summary>
-        /// Closes the inventory interface
-        /// </summary>
-        public void Dispose()
-        {
-        }
-
         /// <summary>
         /// The name of this DB provider
         /// </summary>