I made them a bit more comprehensive.. i hope.
And one theoretically possible error, would've just thrown a huge chunk of error message in your face, i hope that won't happen now, but it is not really possible to get that error message, as long as you don't try to (like REALLY try).

I fixed the Issue, which prevented the Plugin from starting.
( org.bukkit.plugin.InvalidDescriptionException: authors are of wrong type)