FindBugs: All bugs categories must be visible by default
FindBugs: Enable all detectors by default.

Description of visitors from findbugs site:

It specifies a comma-separated list of bug detectors which should be
run. The bug detectors are specified by their class names, without any
package qualification.

By default, all detectors which are not disabled by default are run.
Merge pull request #38 from NEXSTEP/master

Findbugs defaults