Can I add metadata to the source file in eclipse to save / commit / load?

When working, we use svn $ Id $ -Property to track the latest version in our source files (in particular, JavaScript files) when committing.

For small freelance projects at home (on the Internet or in Java), I use version tracking with eclipse and local git.

I would like to add metadata, such as a timestamp or the latest saved version, to my source files. For me, it doesn’t really matter if the data is added when saving, commenting or downloading the file.

A token replacement method such as svns $ Id $ would be best, but I am open to any other method.