The Java > Code Style > Code Templates preference page allows you to customize generated code and comments in a similar way to normal templates. These code templates are used whenever code is generated. (These new templates replace the 'filecomment' and 'typecomment' templates previously used for code generation in R2.1.)

The check box 'Automatically add comments...' allows you to decide if features that create new methods or types add comments automatically or if they are added explicitly with 'Add Javadoc Comment'.