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(),