[WIP] Create FamilyInterface

| Q                    | A
| -------------------- | ---
| Bug fix?             | Y
| New feature?         | N
| BC breaks?           | Y
| CI currently passes? | Y
| Tests pass?          | Y
| Scenarios pass?      | ORM: 1301, ODM: 219
| Checkstyle issues?*  | ?
| PMD issues?**        | ?
| Changelog updated?   | TODO
| Fixed tickets        | ?
| DB schema updated?   | N
| Migration script?    | N
| Doc PR               | N
should only implement FamilyInterface IMO