Why so you need to configure someone else's IDE? Just produce a style checker ruleset (like Checkstyle) and tell team members they can use a non-standard editor if they want, but that any output that doesn't match the style checker will be rejected.
It seems to me that if you never allow anyone to use a different editor than you close your team off to the possibility of finding improved toolsets or workflows.
I don't prevent people from trying stuff, I just don't ant them to keep with a different IDE. They try it for a while, after that either we try it with the rest of the team an decide to adopt it all together or we reject it.
I don't know what is the problem. We just adopted New Relic with this method, removing pingdom + a bunch of custom stuff after someone proposed it, tried it, extended the perimeter of the trial and then it was good to go. We delete the other stuff, and it's our new common tool.
We did the same with our deployment scripts, where a guy started in his corner, but after a while we decided to go whith it and now it's out of question to use any other way to deploy an instance unless we do a collective decision to change.
Concerning the workflow, one guy tried a new testing tool, it appeared good, we now use it. That's it, everybody uses the smae testing framework, the same monitoring tool, the same IDE, the same deployment system. And they can do trial on the side, we'll extend the trial if the first guy testing the tool thinks it's a good stuff for the team and then we'll decide together to adopt it or not. Mostly if the tool is not deemed good the first time, the others won't really ear about it, and if it's good and the extended trial is good, I'll ask we delete something else if possible, try to "trade" one tool/library for another and limiting the entropy.
It seems to me that if you never allow anyone to use a different editor than you close your team off to the possibility of finding improved toolsets or workflows.