• Embedded and Reference
• Select the class for the relationship or create new classes
• Update the Document class 

When creating a new class for a relationship, only create the class with id field. 
The user have to re-run the make:document command to add more fields to the newly created class.

Add a message to the user that tells which files have been created or updated.
Indicates how to add fields.

Check if we can emulate or improve the existing make:entity command.