code: private synchronized void checkFileName(String fileName) throws ParameterException{
  		Validate.notNull(fileName);
  		File cFile = new File(fileName);
  		if(cFile.getName().length()==0)
  			throw new ParameterException(ErrorCode.INCOMPATIBILITY, fileName + " is not a valid file-name!");
  	}
docs: Sets the name for the output file.
  @param fileName Desired file name.
  @throws IllegalArgumentException if the given file name is empty.