diff --git a/pom.xml b/pom.xml
index beb01a3..adb73b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -33,8 +33,10 @@
 		<sonar.login>7af449877bbf41d707e8ae7d322b1d6e9b15a89d</sonar.login>
 		<sonar.jacoco.reportPaths>target/surefire-reports</sonar.jacoco.reportPaths>
 		<sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
+		<sonar.core.codeCoveragePlugin>jacoco</sonar.core.codeCoveragePlugin>
 		<sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
 		<sonar.jacoco.reportPath>${project.basedir}/target/jacoco.exec</sonar.jacoco.reportPath>
+		<sonar.exclusions>${project.basedir}/src/main/webapp/VAADIN/themes/vaadin-clubhelpertheme/styles.css</sonar.exclusions>
 
 	</properties>
 
@@ -240,12 +242,12 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<configuration>
-					<argLine>
-						-javaagent:${sonar.jacoco.jar}=destfile=${sonar.jacoco.reportPath}
-					</argLine>
+<!-- 				<configuration> -->
+<!-- 					<argLine> -->
+<!-- 						-javaagent:${sonar.jacoco.jar}=destfile=${sonar.jacoco.reportPath} -->
+<!-- 					</argLine> -->
 					<!-- <test>**/*.java</test> -->
-				</configuration>
+<!-- 				</configuration> -->
 
 				<dependencies>
 					<dependency>
@@ -253,6 +255,11 @@
 						<artifactId>junit-platform-surefire-provider</artifactId>
 						<version>1.3.1</version>
 					</dependency>
+					<dependency>
+						<groupId>org.junit.jupiter</groupId>
+						<artifactId>junit-jupiter-engine</artifactId>
+						<version>5.1.1</version>
+					</dependency>
 				</dependencies>
 			</plugin>
 			<plugin>
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Adress.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Adress.java
index 2885e3b..316d7fe 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Adress.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Adress.java
@@ -65,7 +65,7 @@ public class Adress implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -81,7 +81,7 @@ public class Adress implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -89,7 +89,7 @@ public class Adress implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Attendance.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Attendance.java
index 0497e5b..fe081d7 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Attendance.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Attendance.java
@@ -45,7 +45,7 @@ public class Attendance implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -53,7 +53,7 @@ public class Attendance implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -61,7 +61,7 @@ public class Attendance implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
@@ -69,7 +69,7 @@ public class Attendance implements Serializable {
 	}
 
 	public Date getOnDate() {
-		return this.onDate;
+		return new Date(this.onDate.getTime());
 	}
 
 	public void setOnDate(Date onDate) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Contact.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Contact.java
index 499e43e..ccb8676 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Contact.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Contact.java
@@ -48,7 +48,7 @@ public class Contact implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -56,7 +56,7 @@ public class Contact implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -64,7 +64,7 @@ public class Contact implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/DeletedEntry.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/DeletedEntry.java
index 78b7e37..27d4d40 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/DeletedEntry.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/DeletedEntry.java
@@ -44,7 +44,7 @@ public class DeletedEntry implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -52,7 +52,7 @@ public class DeletedEntry implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -60,7 +60,7 @@ public class DeletedEntry implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/GroupDef.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/GroupDef.java
index bddfbdf..7ac1126 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/GroupDef.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/GroupDef.java
@@ -63,7 +63,7 @@ public class GroupDef implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -71,7 +71,7 @@ public class GroupDef implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -79,7 +79,7 @@ public class GroupDef implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Person.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Person.java
index 36ab5e8..fcc409d 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Person.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Person.java
@@ -95,7 +95,7 @@ public class Person implements Serializable {
 	}
 
 	public Date getBirth() {
-		return this.birth;
+		return new Date(this.birth.getTime());
 	}
 
 	public void setBirth(Date birth) {
@@ -103,7 +103,7 @@ public class Person implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -111,7 +111,7 @@ public class Person implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -119,7 +119,7 @@ public class Person implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Persongroup.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Persongroup.java
index ca308cb..b0ce573 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Persongroup.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Persongroup.java
@@ -49,7 +49,7 @@ public class Persongroup implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -57,7 +57,7 @@ public class Persongroup implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -65,7 +65,7 @@ public class Persongroup implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Relative.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Relative.java
index 56e37f2..10332d8 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Relative.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Relative.java
@@ -56,7 +56,7 @@ public class Relative implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -64,7 +64,7 @@ public class Relative implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -72,7 +72,7 @@ public class Relative implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Startpaesse.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Startpaesse.java
index 9efad54..3815896 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Startpaesse.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Startpaesse.java
@@ -52,7 +52,7 @@ public class Startpaesse implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -60,7 +60,7 @@ public class Startpaesse implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -68,7 +68,7 @@ public class Startpaesse implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/StartpassStartrechte.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/StartpassStartrechte.java
index 3b055d4..7422a03 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/StartpassStartrechte.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/StartpassStartrechte.java
@@ -58,7 +58,7 @@ public class StartpassStartrechte implements Serializable {
 	}
 
 	public Date getChanged() {
-		return this.changed;
+		return new Date(this.changed.getTime());
 	}
 
 	public void setChanged(Date changed) {
@@ -66,7 +66,7 @@ public class StartpassStartrechte implements Serializable {
 	}
 
 	public Date getCreated() {
-		return this.created;
+		return new Date(this.created.getTime());
 	}
 
 	public void setCreated(Date created) {
@@ -74,7 +74,7 @@ public class StartpassStartrechte implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {
@@ -90,7 +90,7 @@ public class StartpassStartrechte implements Serializable {
 	}
 
 	public Date getStartrechtBeginn() {
-		return this.startrechtBeginn;
+		return new Date(this.startrechtBeginn.getTime());
 	}
 
 	public void setStartrechtBeginn(Date startrechtBeginn) {
@@ -98,7 +98,7 @@ public class StartpassStartrechte implements Serializable {
 	}
 
 	public Date getStartrechtEnde() {
-		return this.startrechtEnde;
+		return new Date(this.startrechtEnde.getTime());
 	}
 
 	public void setStartrechtEnde(Date startrechtEnde) {
diff --git a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Version.java b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Version.java
index ba79162..5323610 100644
--- a/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Version.java
+++ b/src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/data/Version.java
@@ -36,7 +36,7 @@ public class Version implements Serializable {
 	}
 
 	public Date getDeleted() {
-		return this.deleted;
+		return new Date(this.deleted.getTime());
 	}
 
 	public void setDeleted(Date deleted) {