Add basic checkstyle configuration

[gunnarmorling]

Might also require the corresponding Eclipse M2E configuration.

[quintesse]

Why CheckStyle and not some other tool like eg Spotless?

I haven't done any comparison of comparable tools out there, but in my (very limited) experience with Spotless I really appreciate that it can "clean up" the code automatically according to the selected style. That way I'm not obliged to use an IDE or set my IDE formatting to the exact same style used by the project, etc. I can just run mvn spotless:apply.

It seems that would be a very useful feature for an opinionated archetype :-)

[gunnarmorling]

Hey @quintesse, that's a great point! I had suggested Checkstyle mainly because it's the one tool in that category I'm familiar with the most, but absolutely agreed that having symmetry between validating and applying configuration is very desirable. If Spotless does offer that and generally is in the same ballpark in terms of capabilities as Checkstyle, I'm all for it.

[gunnarmorling]

Hey @Naros, Tako's comment reminded me of that discussion we recently had on consitent member ordering. Perhaps Spotless would support that?

[Naros]

Hi @gunnarmorling sorry for the late reply; this ended up in my personal inbox :)

It's certainly possible and I'll check it out. Honestly, if Spotless can adhere to our current format standards and give us the auto-formatting functionality we already get from the other plugins; then I'd be all for having 1 plug-in do it all rather than relying on 3 plug-ins.

I'll give it a look over the next few days and let you know.