docs: public static File renameFileWithSystemtime(final File fileToRename)
  		throws IOException, FileIsADirectoryException
  	{
  		final String newFilenameWithSystemtime = appendSystemtimeToFilename(fileToRename);
  		final File fileWithNewName = new File(fileToRename.getParent(), newFilenameWithSystemtime);
  		renameFile(fileToRename, fileWithNewName, true);
  		return fileWithNewName;
  	}