logFileHandler = new FileHandler( generateUniqueLogFileName(namePrefix), true );
logFileHandler = new FileHandler( generateUniqueLogFileName(directoryName), true );
	public static void startEngineLogging( String namePrefix, Level logLevel )	{		Logger logger = Logger.getLogger( BIRT_NAME_SPACE );		assert (logger != null);				if ( logLevel != null )			logger.setLevel( logLevel );					FileHandler logFileHandler = null;			try {			logFileHandler = new FileHandler( generateUniqueLogFileName(namePrefix), true );		} catch (SecurityException e) {			e.printStackTrace();		} catch (IOException e) {			e.printStackTrace();		}				if ( logFileHandler != null )		{			logFileHandler.setFormatter( new SimpleFormatter() ); // In BIRT log, we should always use the simple format.			logger.addHandler( logFileHandler );		}	}