OK, this is either a dumb or an invalid question.
I found a tutorial regarding frame buffers here http://www.swiftless.com/tutorials/opengl/framebuffer.html
In the tutorial, there is a mention of a class called GLenum, which is supposedly for error-checking. My concern now is that I can't find the package to which it belongs (See? Dumb.). I've Googled it and everything and saw results of import lines concerning the class but they appear to be in a package that isn't included in the standard LWJGL distribution.
I need help, thank you.