Multiple Javadoc warnings

[Kortanul]

Versions affected

1.5.0.0 - 1.5.1.0 (probably 1.5.2.0 and master as well, though they're not buildable yet)

Repo steps

1. checkout the project at version 1.5.0.0 (9c7a452) OR version 1.5.1.0 (aa812ab).
2. execute WREN_DEFAULT_MVN_COMPILE_ARGS="-DskipTests" wren-deploy compile-current-release.

Expected

Builds succeed with no Javadoc warnings.

Actual results

There are many Javadoc warnings about missing tags and bad references.

See attached logs.
build-javadoc-1.5.0.0-filtered.log
build-javadoc-1.5.1.0-filtered.log