*
     * @param prefix The prefix for the file name.
     * @param suffix The suffix for the file name.
     * @return The created temporary file.
     * @throws IORuntimeException if the file cannot be created.
     */
    public File createTempFile(final String prefix, final String suffix) {
        try {
            final File file = File.createTempFile(prefix, suffix);
            file.setReadable(false, false);

                logger.warn("Failed to flush config files.", e);
                callback.run();
            });
            break;
        }
    }

    /**
     * Generates a new index name with timestamp suffix.
     *
     * @param configIndex the base index configuration name
     * @return the generated index name with timestamp
     */
    protected String generateNewIndexName(final String configIndex) {