geekyQ: help me convert file encodings!

I should be writing about my life, which I haven't done in a while, but instead I'm asking a question.

I have a file structure as follows:

item_000
  FileOne.pdf
  dublin_core.xml
  contents
item_001
  FileTwo.pdf
  dublin_core.xml
  contents
item_002
...

The "contents" files are plain-text files without an extension. They're all in UTF-8, but they need to be in UTF-8, no BOM. What's a good way to do that?