Adding a code of conduct to SpotBugs project

[KengoTODA]

I think we have less trouble around communication, however it's better to have code of conduct in each project, to reduce possible troubles in future.

I think Contributor Covenant is enough to apply. It's enough short, simple, understandable and reasonable.
If you have opinion about which one we should apply/follow, please share in this thread.

[iloveeclipse]

It must come some time.

If you haven't followed the recent hype : https://www.neowin.net/news/sqlite-joins-the-party-with-a-rather-unique-code-of-conduct-policy/

I think I'm ore on the Stallman's side (https://lists.gnu.org/archive/html/info-gnu/2018-10/msg00001.html).

I wish that I can contribute without being a lawyer and checking every written sentence for a possible "abusive, harassing, or otherwise unacceptable behavior" as stated in "Contributor Covenant".

So I'm for
https://www.gnu.org/philosophy/kind-communication.html

[KengoTODA]

I know the news regarding SQLite. It was sad news for me one of its user……

[KengoTODA]

GNU's one seems nice. But it's not portable so we need to replace several words by own. Of course, it's possible, thought.

[KengoTODA]

I also checked http://citizencodeofconduct.org/ but it's not suitable for small organization like us.

I feel it has clear definition unlike Contributor Covenant.
However we need to decide reporting guideline, governing policy and others. It's little bit costly for us.