So I added a feature that can be enabled/disabled with a simple command. Right now when you enable/disable the feature, a boolean changes from true to false, like this: Code (Java): public static Map<UUID, Boolean> mModeDisabled = new HashMap<UUID, Boolean>(); However, I need to save the player's choice in a config to that it doesn't reset on every server restart. To decrease amount of writes to the config, it should only save whenever the server shuts down, but I'm not sure how to save/load a Map to the config. What would be the easiest way to do this? Maybe a boolean isn't even necessary?