private boolean closed;

    /**
     * Default constructor that registers a shutdown hook for cleanup
     */
    public AbstractCIFSContext() {
        Runtime.getRuntime().addShutdownHook(this);
    }

    /**
     * @param creds the credentials to use
     * @return a wrapped context with the given credentials
     */
    @Override

        callerInfo = new NullPointerException().getStackTrace()[2];

        Runnable warning = this::maybeWarnAboutCleanUp;

        cleanupWarning = new Thread(warning);

        Runtime.getRuntime().addShutdownHook(cleanupWarning);
    }

    private void maybeWarnAboutCleanUp() {
        if (warnAboutCleanup) {
            System.out.println("[WARNING] TestFileManager from: " + callerInfo.getClassName() + " not cleaned up!");

                        logger.debug("Destroying LaContainer...");
                    }
                    destroyContainer();
                }
            };
            Runtime.getRuntime().addShutdownHook(shutdownCallback);

            systemMonitorTask = TimeoutManager.getInstance()
                    .addTimeoutTarget(new SystemMonitorTarget(), ComponentUtil.getFessConfig().getThumbnailSystemMonitorIntervalAsInteger(),

                        logger.debug("Destroying LaContainer...");
                    }
                    destroyContainer();
                }
            };
            Runtime.getRuntime().addShutdownHook(shutdownCallback);

            systemMonitorTask = TimeoutManager.getInstance()
                    .addTimeoutTarget(new SystemMonitorTarget(), ComponentUtil.getFessConfig().getSuggestSystemMonitorIntervalAsInteger(),

                  // We're shutting down anyway, so just ignore.
                }
              }));
    }

    @VisibleForTesting
    void addShutdownHook(Thread hook) {
      Runtime.getRuntime().addShutdownHook(hook);
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // TODO
  private static void useDaemonThreadFactory(ThreadPoolExecutor executor) {
    executor.setThreadFactory(

            return t;
        };
        cleanupExecutor = Executors.newSingleThreadScheduledExecutor(threadFactory);

        // Add shutdown hook for cleanup
        Runtime.getRuntime().addShutdownHook(new Thread(this::shutdown, "ResourceManager-Shutdown"));

        startCleanupTask();
    }

    /**
     * Get the singleton instance
     *
     * @return ResourceManager instance
     */

        .testNulls();
  }

  private static class TestApplication extends Application {
    private final List<Thread> hooks = new ArrayList<>();

    @Override
    synchronized void addShutdownHook(Thread hook) {
      hooks.add(hook);
    }

    synchronized void shutdown() throws InterruptedException {
      for (Thread hook : hooks) {
        hook.start();
      }

            eventTimings.put(type, new AtomicLong(0));
        }

        // Start async logging processor
        startAsyncProcessor();

        // Register shutdown hook
        Runtime.getRuntime().addShutdownHook(new Thread(this::shutdown));
    }

    private void startAsyncProcessor() {
        logExecutor.submit(() -> {
            while (!shutdown) {
                try {

        .testNulls();
  }

  private static class TestApplication extends Application {
    private final List<Thread> hooks = new ArrayList<>();

    @Override
    synchronized void addShutdownHook(Thread hook) {
      hooks.add(hook);
    }

    synchronized void shutdown() throws InterruptedException {
      for (Thread hook : hooks) {
        hook.start();
      }

                @Override
                public void run() {
                    destroyContainer();
                }

            };
            Runtime.getRuntime().addShutdownHook(shutdownCallback);

            commandThread = new Thread(() -> {
                try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
                    String command;