Added Javadoc comments to avoid mvn install errors

I was setting up the project on my laptop (just installed Linux... it was a huge pain to get it working :/) and noticed some errors when I ran <code>mvn install</code>.

They are mostly Javadoc errors, so I thought I'd fix those - however, I'm getting these as well.  Any ideas?

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project jreddit: Compilation failure: Compilation failure:
[ERROR] mydirs/jReddit/src/main/java/com/github/jreddit/subreddit/Subreddits.java:[33,15] error: generics are not supported in -source 1.3
[ERROR] use -source 5 or higher to enable generics
[ERROR] mydirs/jReddit/src/main/java/com/github/jreddit/subreddit/Subreddits.java:[82,31] error: enhanced for loops are not supported in -source 1.3

I was running into a ton of trouble getting the JDK set up, so I'm sure it has something to do with that.  I'll run maven on my other computer when I get home to double check.