Java backend generates invalid package name

[andreasabel]

If my input is my-grammar.cf, bnfc will create java code with package name my-grammar which is not legal.

[EncodePanda]

what would be the right name for the package? mygrammar or my_grammar? or just forbid the generation of the java code at all?

[andreasabel]

Following https://docs.oracle.com/javase/tutorial/java/package/namingpkgs.html it seems that snake_case is the convention.