How to structure a Play project using a cake template

The following is a typical layout of a Play application project:

myProject
    + app
       + controllers
       + models
       + views

I think that the content controllers, modelsand viewsit is clear to most of us. Now suppose we need to implement a DAO service using the cake pattern:

DaoServiceComponent.scala

trait DaoServiceComponent[A] {

  def daoService: DaoService

  trait DaoService {

    def insert(entity: A): Future[A]
    def find(id: Id): Future[Option[A]]
    ...
  }
}

trait DefaultDaoServiceComponent[A] extends DaoServiceComponent[A] {
  this: DaoComponent[A] =>

  def daoService = new DaoService {

    def insert(entity: A) = dao.insert(entity)
    def find(id: Id) = dao.find(id)
    ...
  }
}

DaoComponent.scala

trait DaoComponent[A] {

  def dao: Dao

  trait Dao {

    def insert(entity: A): Future[A]
    def find(id: Id): Future[Option[A]]
    ...
  }
}

UserDaoComponent.scala

trait UserDaoComponent extends DaoComponent[User] {

  protected val collection: JSONCollection

  def dao = new Dao {

    def insert(entity: User): Future[User] = {
      ...
    }

    def find(id: Id): Future[Option[User]] = {
      ...
    }
  }
}

And finally, we connect everything in our controller object, as usual:

object Users extends Controller {

  private val userService: DaoServiceComponent[User]#DaoService =
    new DefaultDaoServiceComponent[User]
    with UserDaoComponent {
      val collection = db.collection[JSONCollection]("users")
    }.daoService

  def create = Action.async(parse.json) { implicit request =>
    request.body.validate[User].fold(
      valid = { user =>
        userService.insert()..
    ...
  }
}

Now back to our mock draft, where we have to put DaoServiceComponent, DaoComponent, UserDaoComponentand any other support class? Should these files be cataloged services?

myProject
    + app
       + controllers
       + models
       + services
            + DaoComponent.scala
            + DaoException.scala
            + DaoServiceComponent.scala
            + EmailServiceComponent.scala
            + RichEmailComponent.scala
            + ServiceException.scala
            + UserDaoComponent.scala
            + ...
       + views