Dao sets change and create date

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/dao/AbstractDaoImpl.java

@@ -1,5 +1,6 @@
 package de.kreth.vaadin.clubhelper.vaadinclubhelper.dao;
 
+import java.util.Date;
 import java.util.List;
 
 import javax.persistence.EntityManager;
@@ -29,9 +30,13 @@ public abstract class AbstractDaoImpl<T extends EntityAccessor> implements IDao<
 	@Transactional
 	public void save(T obj) {
 
+		Date now = new Date();
+		obj.setChanged(now);
 		if (entityManager.contains(obj) || obj.hasValidId()) {
+
 			entityManager.merge(obj);
 		} else {
+			obj.setCreated(now);
 			entityManager.persist(obj);
 		}
 	}

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/ClubEvent.java

@@ -234,4 +234,14 @@ public class ClubEvent extends BasicItem implements EntityAccessor {
 		return id != null && !id.isBlank();
 	}
 
+	@Override
+	public void setChanged(Date changed) {
+		// no ChangeDate stored
+	}
+
+	@Override
+	public void setCreated(Date created) {
+		// noCreateDateStored
+	}
+
 }

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/EntityAccessor.java

@@ -1,7 +1,13 @@
 package de.kreth.vaadin.clubhelper.vaadinclubhelper.data;
 
+import java.util.Date;
+
 public interface EntityAccessor {
 
 	boolean hasValidId();
 
+	void setChanged(Date changed);
+
+	void setCreated(Date created);
+
 }