Replace Java 1.4 era 'for' loops

[Juiceman]

Use Enhanced 'for' loops

[Bombe]

While the enhanced for loops are nice, I would suggest to actually go one step further and use the Stream API, e.g.

buckets.stream().forEach(Bucket::free);

Of course that’s only possible in places where the method being called does not throw exceptions…

[bertm]

If you're following Bombe's suggestion, please consider leaving out the .stream() (just using Iterable's forEach(Consumer)):

buckets.forEach(Bucket::free);

[hernic]

@Bombe could you review this one ?