public void addNewSource(DIDataSource datasource, List<DITableSource> tables)
 {
     DI_DAO dao = null;
     try
     {
         dao = new DI_DAO();
         dao.beginTransaction();
         dao.addDataSource(datasource);
         foreach (DITableSource table in tables)
         {
             dao.addTableSource(table);
         }
         dao.commitTransaction();
     }
     catch (Exception ex)
     {
         dao.rollbackTransaction();
         throw ex;
     }
 }