Fix tools to be consistent with scalastyle

[jtescher]

Most style violations were:

• multiline if block without braces
• public methods having explicit type
• license header

[dszeto]

Thanks!

[jtescher]

Any idea why this isn't reflected in the contributor graph? https://github.com/PredictionIO/PredictionIO/graphs/contributors

[dszeto]

Odd indeed. According to https://help.github.com/articles/i-don-t-see-myself-in-the-repository-contributors-graph/, your name should have shown up.

[dszeto]

Hey, I just realized your commits are associated with your gmail.com e-mail address. You will need to associate that e-mail address with your GitHub account for you to show up on the contributor graph. Once you've done it, GitHub should update automatically.

[jtescher]

Oh yeah! Thanks fixed it.