private static String getMarkMessage(String username) {
        final List<String> args = new ArrayList<>();
        args.add(username);
        args.add(JiveGlobals.formatDateTime(new java.util.Date()));
        return LocaleUtils.getLocalizedString("log.marker_inserted_by", args);
    }
Returns the directory that log files exist in. The directory name will
have a File.separator as the last character in the string.

@return the directory that log files exist in.
xmppserver/src/main/java/org/jivesoftware/util/Log.java