Annotate methods that return a definitely null value with @Nullable

We intend to enable the ReturnMissingNullable errorprone pattern in
Gerrit core and this fixes the current issues.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I077ad0ddfa8ce0c07dc08cc1e4414e35830cd843
5 files changed
tree: 257b8a97ad4ac034d21add47e2c9f1989475f573
  1. src/
  2. .gitignore
  3. BUILD
  4. LICENSE
  5. README.md
README.md

Gerrit download-commands plugin

All documentation may be found under src/main/resources/Documentation/.