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: I35cdd340aff94b8111b3864a676ecd9a9b4409af
1 file changed
tree: 0bdadb91f3a569e2958f8801810edc18dbf41fb8
  1. .settings/
  2. src/
  3. .gitignore
  4. BUILD
  5. LICENSE