code: public static void fileName(String fileName) {
  		if(!validation) return;
  		Validate.notNull(fileName);
  		Validate.notEmpty(fileName);
  		if(fileName.contains(File.separator))
  			throw new ParameterException("File name contains path separator char!");
  	}
docs: Checks if the given String is a valid file name.<br>
  This method assumes that the String does not contain any path information but just the file name.<br>
  file names must neither be <code>null</code> nor empty or contain file separators.
  @param fileName The file name to validate.
  @throws ParameterException if the given String is not a valid file name.