Add missing close

src/com/hectorone/multismssender/DeliveryDbAdapter.java

@@ -101,10 +101,12 @@ public class DeliveryDbAdapter {
 	public DeliveryDbAdapter open() throws SQLException {
 		mDbHelper = new DeliveryDbHelper(mCtx);
 		mDb = mDbHelper.getWritableDatabase();
+		
 		return this;
 	}
 
 	public void close() {
+		mDb.close();
 		mDbHelper.close();
 	}