Usually Eclipse uses your login alias as default in the @Author-tag in Java. You can change this by altering the values stored at

Window -> Preferences -> Java -> Code Style -> Code Templates -> Comments – >Types -> Edit

Window -> Preferences -> Java -> Editor -> Templates -> @author -> Edit

and change the  ${user} variable to whatever you like in both menus. It’s not a pretty way, hardcoding the values – but it’s universal and it works!