Generic types don't use their raw type for imports

[rodmibielli]

This little correction avoids a syntax error in the generated code whenever you have a javacode with generics type.

example:

public one.One<String> method() {
  return null;
}

It generates

import one.One<String>; (wrong!)

With this fix
it then generates

import one.One;

[mhalbritter]

Thanks for the PR, @rodmibielli ! I've also added the same treatment for Groovy and Kotlin.