Fix Java coding style warnings.

* Use boolean instead of Boolean.
* Call add() and check result instead of contains() and add().
* Call Paths.get(dir, file) instead of Paths.get(file_path).

Change-Id: I26a40b24614d8fab4f8e0776dcde4cb1c7d1af4d
3 files changed
tree: 1b86f631dbf6669a10947a83cd57c3a6f636562c
  1. src/
  2. BUILD
  3. LICENSE
  4. OWNERS