_LOG.log(Level.INFO, "Register component demo '" + componentDemo.getDisplayName() + "' in category '" + categoryName + "'");
IComponentDemoCategory category = categoriesRegistry.get(categoryId);
if (category == null) {
category = new ComponentDemoCategoryImpl(categoryId, categoryName);
categories.add(category);
categoriesRegistry.put(categoryId, category);
}