_conn.setAutoCommit( false );
    public boolean run( CWVerboseStream stream ) {        try {            _db = _category.getDatabase( stream.verbose() );            _conn = _category.getJDBCConnection();            boolean result = true;            for ( int i=0; i < 4; i++ ) {                _cacheType = i;                if ( !runOnce( stream ) )                    result = false;            }            _db.close();            _conn.close();            if ( _errLeak )                System.out.println("Element leak happened!");            if ( _errCount )                System.out.println("Sum do not match!");            return result && !_errLeak && !_errCount;        } catch ( Exception e ) {            stream.write( "Error: "+ e );            return false;        }    }