this.trackingFileManager = trackingFileManager;
    }

    /**
     * For testing purposes.
     */
    public DefaultUpdateCheckManager(Logger logger, TrackingFileManager trackingFileManager) {
        enableLogging(logger);
        this.trackingFileManager = trackingFileManager;
    }

    public static final String LAST_UPDATE_TAG = ".lastUpdated";

    private static final String TOUCHFILE_NAME = "resolver-status.properties";