if (instanceFile != null)
if (instanceFile != null || readOnly)
	private void initializeInstanceFile() throws IOException {		if (instanceFile != null)			return;		this.instanceFile = File.createTempFile(".tmp", ".instance", managerRoot); //$NON-NLS-1$//$NON-NLS-2$		this.instanceFile.deleteOnExit();		instanceLocker = BasicLocation.createLocker(instanceFile, lockMode);		instanceLocker.lock();	}