class PluginDownloadManager {

    private static final Logger Log = LoggerFactory.getLogger(PluginDownloadManager.class);

    /**
     * Starts the download process of a given plugin with it's URL.
     *
     * @param url the url of the plugin to download.
     * @return the Update.
     */
    public Update downloadPlugin(String url) {
        UpdateManager updateManager = XMPPServer.getInstance().getUpdateManager();
        updateManager.downloadPlugin(url);

        Update returnUpdate = null;
        for (Update update : updateManager.getPluginUpdates()) {
            if (update.getURL().equals(url)) {
                returnUpdate = update;
                break;
            }
        }

        return returnUpdate;
    }

    /**
     * Installs a new plugin into Openfire.
     *
     * @param url the url of the plugin to install.
     * @param version the version of the new plugin
     * @param hashCode the matching hashcode of the <code>AvailablePlugin</code>.
     * @return the hashCode.
     */
    public DownloadStatus installPlugin(String url, String version, int hashCode) {<FILL_FUNCTION_BODY>}

    /**
     * Updates the PluginList from the server. Please note, this method is used with javascript calls and will not
     * be found with a find usages.
     *
     * @return true if the plugin list was updated.
     */
    public boolean updatePluginsList() {
        UpdateManager updateManager = XMPPServer.getInstance().getUpdateManager();
        try {
            // Todo: Unify update checking into one xml file. Have the update check set the last check property.
            updateManager.checkForServerUpdate(true);
            updateManager.checkForPluginsUpdates(true);

            // Keep track of the last time we checked for updates
            UpdateManager.LAST_UPDATE_CHECK.setValue(Instant.now());

            return true;
        }
        catch (Exception e) {
            Log.error(e.getMessage(), e);
            if (e instanceof InterruptedException) {
                Thread.currentThread().interrupt();
            }

        }

        return false;
    }
}

        UpdateManager updateManager = XMPPServer.getInstance().getUpdateManager();

        boolean worked = updateManager.downloadPlugin(url);

        final DownloadStatus status = new DownloadStatus();
        status.setHashCode(hashCode);
        status.setVersion(version);
        status.setSuccessfull(worked);
        status.setUrl(url);

        return status;
    
<no_super_class>