I have a List<String> that I want to stay consistent when bukkit starts up and shutsdown, etc. Are there any easy alternatives to yaml/mysql/sqllite? I heard about something called persistence but I can't seem to find anything informative on it.
All things that aren't physically saved to a file are saved to memory. When a server shuts down, it shuts down all async methods that are tied to bukkit. Creating plugins out of bukkit in compared to creating a file is completely different and complicated. It would be easier to create a file. What exactly are you trying to do?