Add Serializer

src/main/kotlin/fr/postgresjson/entity/Entity.kt

@@ -0,0 +1,16 @@
+package fr.postgresjson.entity
+
+import java.util.*
+
+interface EntityI<T> {
+    var id: T
+}
+abstract class Entity<T>(override var id: T) : EntityI<T>
+abstract class UuidEntity(override var id: UUID = UUID.randomUUID()) : Entity<UUID>(id) {}
+abstract class IdEntity(override var id: Int) : Entity<Int>(id)
+
+interface EntityVersioning<T> {
+    var version: T
+}
+
+interface EntityVersioningIncrement : EntityVersioning<Int>