How to add a UTF-8 BOM in Java?

by 
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(...), StandardCharsets.UTF_8));
out.write('\ufeff');
out.write(...);

This correctly writes out 0xEF 0xBB 0xBF to the file, which is the UTF-8 representation of the BOM.

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