For a project with modules in Scala and Java (side by side), how to combine scaladoc with javadoc to provide a single view of the documentation for the project?
Scaladocs and javadoc are very different, with different formats. They are just two different animals and I don't think it makes sense to combine them. So, AFAIK, Maven doesn't offer any support for that (which is not surprising), just generate both of them separately.