* the "Fess-WebAppJar" manifest attribute.
     *
     * @throws LifecycleException if an error occurs during processing
     */
    @Override
    protected void processWebInfLib() throws LifecycleException {
        super.processWebInfLib();

        final WebResource[] possibleJars = listResources("/WEB-INF/plugin", false);

        for (final WebResource possibleJar : possibleJars) {