Solved plugin.saveResource does nothing but NullPointerException

I feel quite stupid posting this because I seem to be the only person who is having issues

I want to have a custom config file and so I followed the wiki and I HAVE added the custom config file into my jar file before you say that is my problem (first thing I checked)
yet when I run the plugin it always fails on plugin.saveResource giving a NullPointerException

I did some googling but no one seems to have a solution, in fact 'plugin.saveResource' seems undocumented???

Any ideas???

Ok found the problem
somehow missed initializing the plugin variable
fixed by adding
plugin = this;
to my onEnable

feel quite dumb for missing that