Started working on the repository structure and injection

app/controllers/Application.scala

@@ -1,9 +1,11 @@
 package controllers
 
+import models.ProductModel
 import play.api._
 import play.api.mvc._
+import repositories.Repository
 
-class Application extends Controller {
+class Application(productsRepository: Repository[ProductModel, Int]) extends Controller {
 
   def index = Action {
     Ok(views.html.index("Your new application is ready."))

app/models/ProductModel.scala

@@ -0,0 +1,3 @@
+package models
+
+case class ProductModel(id: Int, name: String)

app/repositories/Repository.scala

@@ -0,0 +1,5 @@
+package repositories
+
+abstract trait Repository[M, I] {
+  def getOneById(id: I): M
+}