Fixed code issues and wrote some new java classes

All of the code issues reported by Checkstyles are fixed. Now the number of code issues went down to 2.

Gary copied the campus and semester table to my database. I can get the course names from these tables by writing a new stored procedure that queries these tables. Gary also gave me this new stored procedure but I couldn't save it to my database. I guessed he forgot the to give me the write permission to the database. I emailed him reporting the problem. Hopefully he will fix this next week.

Even though I can't call this stored procedure at this moment, I can still write a bean class called CourseNameByCampus and a new method that calls the stored procedure. Everything is ready now, just waiting for the the stored procedure to be saved into the database.