Its really nice IDEA can create a 'Singleton' class automatically by simply selecting New | Singleton. It would be equally nice to have an "Immutable" class where developer would be prompted with a list of class members and a constructor with final members and getters is created. I create immutables just as often as singletons. Its nice to have a tool that leads new developers down the correct path for this pattern, just as your Singleton generator does.