Github user justinleet commented on the issue:
https://github.com/apache/incubator-metron/pull/567
They sneak in because most of our license headers are Javadoc (`/**`)
instead of just comments (`/*`). It's something I noticed when looking at
autoformatting against Checkstyle. So when IntelliJ tries to autoformat, it
tries to correct the Javadoc.
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