Bug

I use Maven as build system. Never tried gradle.

And I´m not currently using any version control system, but I might try git. There was one episode in the past when I lost hours trying to figure out why my bot score dropped about 30% in challenges. I could have found the bug in minutes with version control.

We are use ant and maven at work for enterprise project and gradual migrate to gradle, so i definitely can suggest to try gradle^) Especially because you can easy generate gradle project from maven project: http://gradle.org/docs/current/userguide/bootstrap_plugin.html