public void setPluginAvailable(Plugin plugin) {
    availablePlugins.add(plugin);

    switch (plugin) {
      case PS_STATUS: psStatusData = new PSStatusData(); break;
      case UPDATE_NOTIFIER: updateNotifierData = new UpdateNotifierData(); break;
      case QUOTAS: quotasData = new QuotasData(); break;
      case SMART: smartData = new SmartData(); break;
    }
  }