} catch (final Exception e) {
            throw new FessSystemException("Failed to parse project.properties.", e);
        }
    }

    /**
     * Destroys the SystemHelper and executes shutdown hooks.
     */
    @PreDestroy
    public void destroy() {
        shutdownHookList.forEach(action -> {
            try {
                action.run();
            } catch (final Exception e) {