Fix many diesel_engine_fuel_types not being registered if one is inco…

[Amronos]

…rrect

When defining custom fuel types using datapacks, if you get a JSON file incorrect or a fuel added there, is not present in-game, the registering process for fuels stops due to the return; statements. This causes the other correctly defined fuels to not get registered, including the ones registered by default in this mod. I have fixed this by removing the return;, reversing the two if statements in which they were, and adding the necessary code inside those if statements.
Also, my IDE did some formatting and renamed cdgJei.java to CDGJEI.java. If you are not ok with these changes I can revert them.

[george8188625]

So that return is a mistake, I should have used continue, or do it the way you proposed. About the renaming of CDGJEI, I've already renamed this in the un-released update. I renamed and refactored almost everything. The update is almost done, I just need to fix a bug and do some polishing.

I don't think I'm gonna merge this pr, because I'm gonna refactor that class either way, but thanks for pointing out that mistake. I'm gonna fix that.

[Amronos]

Thanks!