Release Audit Tool (RAT) is a tool to improve accuracy and efficiency when checking releases. It is heuristic in nature: making guesses about possible problems. It will produce false positives and cannot find every possible issue with a release. It's reports require interpretation.
Run from the command line with:
java -jar apache-rat-VERSION.jar --help
Where VERSION is replaced with the version number you are working with.
This will output a help message detailing the command line options available to you.
RAT can be used to automatically add licence headers to files that do not currently have them. Only files that are not excluded by the RAT configurations will be affected.
To add licence headers use a command such as:
java -jar apache-rat-VERSION.jar --addLicence --copyright "Copyright 2008 Foo" /path/to/project
This command will add the licence header directly to the source files. If you prefer to see which files will be changed and how then remove the "--force" option.