manager.destroy();
        } finally {
            System.clearProperty(Constants.FESS_VAR_PATH);
        }
    }

    // Test initialization with non-existent directory
    public void test_init_nonExistentDirectory() {
        ThumbnailManager manager = new ThumbnailManager() {
            @Override
            public void init() {
                baseDir = new File(tempDir, "nonexistent/dir");