code: private static void doClean(DBCleanerTool dbCleaner) throws DBCleanException, SQLException
     {
        Connection jdbcConn = dbCleaner.getConnection();
        try
        {
           dbCleaner.clean();
           dbCleaner.commit();
  
           jdbcConn.commit();
        }
        catch (SQLException e)
        {
           jdbcConn.rollback();
  
           dbCleaner.rollback();
  
           jdbcConn.commit();
        }
     }
docs: Cleaning.
  
  @throws SQLException