if (locker == null)
if (locker == null) {
	private boolean lock() throws IOException {		if (readOnly)			return false;		if (locker == null)			locker = BasicLocation.createLocker(lockFile, lockMode);		if (locker == null)			throw new IOException(EclipseAdaptorMsg.fileManager_cannotLock);		return locker.lock();	}