Getting started with Travis-Ci is pretty easy. First, we should create a .travis.yml file in root project directory. The second step is to create hooks between GitHub and Travis.
In my configuration of Travis, I used two operation systems: Windows and Linux. This configuration allows to runs each build in an isolated Google Compute Engine virtual machine that offer a vanilla build environment for each build. That allows creating clean slate and making clear output for our tests that runs in environment build from scratch every time.
Of course, this is some example of the initial setup for Travis, that I currently use for my pet project. In the near feature it will be updated for more components such as data store, environmental variables and adding APT Sources.
Travis will automatically create matrix environment variable with each Java version. In that case, all test will be run for every combination of three.