diff --git a/hsarback/src/de/hsadmin/hostsharing/MultiOption.java b/hsarback/src/de/hsadmin/hostsharing/MultiOption.java
new file mode 100644
index 0000000..5eb3abe
--- /dev/null
+++ b/hsarback/src/de/hsadmin/hostsharing/MultiOption.java
@@ -0,0 +1,10 @@
+package de.hsadmin.hostsharing;
+
+public class MultiOption {
+
+	public static final int DATABASEUSERS_PER_OPTION = 25;
+	public static final int DATABASES_PER_OPTION = 25;
+	public static final int EMAIL_ITEMS_PER_OPTION = 250;
+	public static final int UNIXUSERS_PER_OPTION = 50;
+
+}
diff --git a/hsarback/src/de/hsadmin/mods/db/MySqlDatabaseModuleImpl.java b/hsarback/src/de/hsadmin/mods/db/MySqlDatabaseModuleImpl.java
index 6da6e69..ba2a995 100644
--- a/hsarback/src/de/hsadmin/mods/db/MySqlDatabaseModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/db/MySqlDatabaseModuleImpl.java
@@ -10,13 +10,12 @@ import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.AuthorisationException;
 import de.hsadmin.core.model.HSAdminException;
 import de.hsadmin.core.model.Transaction;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 import de.hsadmin.mods.user.UnixUser;
 
 public class MySqlDatabaseModuleImpl extends AbstractModuleImpl {
 
-	private static final int DBS_PER_MULTI_OPTION = 25;
-
 	@Override
 	public List<AbstractEntity> search(Class<? extends AbstractEntity> entityClass,
 			String condition, String orderBy) throws HSAdminException {
@@ -64,7 +63,7 @@ public class MySqlDatabaseModuleImpl extends AbstractModuleImpl {
 		//TODO: Needs better implementation
 		Query qDatabases = em.createQuery("SELECT obj FROM Database obj WHERE obj.pac.id = :pacId");
 		qDatabases.setParameter("pacId", pac.getId());
-		if (qDatabases.getResultList().size() >= DBS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qDatabases.getResultList().size() >= MultiOption.DATABASES_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included number of databases exceeded");
 		}		
 		database.setPac(pac);
diff --git a/hsarback/src/de/hsadmin/mods/db/MySqlUserModuleImpl.java b/hsarback/src/de/hsadmin/mods/db/MySqlUserModuleImpl.java
index cd101ce..f5f64d1 100644
--- a/hsarback/src/de/hsadmin/mods/db/MySqlUserModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/db/MySqlUserModuleImpl.java
@@ -10,13 +10,12 @@ import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.AuthorisationException;
 import de.hsadmin.core.model.HSAdminException;
 import de.hsadmin.core.model.Transaction;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 import de.hsadmin.mods.user.UnixUser;
 
 public class MySqlUserModuleImpl extends AbstractModuleImpl {
 
-	private static final int DBUSERS_PER_MULTI_OPTION = 25;
-
 	@Override
 	public AbstractEntity add(AbstractEntity newEntity) throws HSAdminException {
 		Transaction transaction = getTransaction();
@@ -45,7 +44,7 @@ public class MySqlUserModuleImpl extends AbstractModuleImpl {
 		//TODO: Needs better implementation
 		Query qDatabaseUsers = em.createQuery("SELECT obj FROM DatabaseUser obj WHERE obj.pac.id = :pacId");
 		qDatabaseUsers.setParameter("pacId", pac.getId());
-		if (qDatabaseUsers.getResultList().size() >= DBUSERS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qDatabaseUsers.getResultList().size() >= MultiOption.DATABASEUSERS_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included database users exceeded");
 		}		
 		user.setPac(pac);
diff --git a/hsarback/src/de/hsadmin/mods/db/PgSqlDatabaseModuleImpl.java b/hsarback/src/de/hsadmin/mods/db/PgSqlDatabaseModuleImpl.java
index 2fbb045..fd165a4 100644
--- a/hsarback/src/de/hsadmin/mods/db/PgSqlDatabaseModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/db/PgSqlDatabaseModuleImpl.java
@@ -10,13 +10,12 @@ import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.AuthorisationException;
 import de.hsadmin.core.model.HSAdminException;
 import de.hsadmin.core.model.Transaction;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 import de.hsadmin.mods.user.UnixUser;
 
 public class PgSqlDatabaseModuleImpl extends AbstractModuleImpl {
 
-	private static final int DBS_PER_MULTI_OPTION = 25;
-
 	@Override
 	public List<AbstractEntity> search(Class<? extends AbstractEntity> entityClass, String condition, String orderBy) throws HSAdminException {
 		if (orderBy == null || orderBy.length() == 0) {
@@ -63,7 +62,7 @@ public class PgSqlDatabaseModuleImpl extends AbstractModuleImpl {
 		//TODO: Needs better implementation
 		Query qDatabases = em.createQuery("SELECT obj FROM Database obj WHERE obj.pac.id = :pacId");
 		qDatabases.setParameter("pacId", pac.getId());
-		if (qDatabases.getResultList().size() >= DBS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qDatabases.getResultList().size() >= MultiOption.DATABASES_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included databases exceeded");
 		}
 		database.setPac(pac);
diff --git a/hsarback/src/de/hsadmin/mods/db/PgSqlUserModuleImpl.java b/hsarback/src/de/hsadmin/mods/db/PgSqlUserModuleImpl.java
index db7df69..802efe0 100644
--- a/hsarback/src/de/hsadmin/mods/db/PgSqlUserModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/db/PgSqlUserModuleImpl.java
@@ -9,13 +9,12 @@ import de.hsadmin.core.model.AbstractEntity;
 import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.AuthorisationException;
 import de.hsadmin.core.model.HSAdminException;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 import de.hsadmin.mods.user.UnixUser;
 
 public class PgSqlUserModuleImpl extends AbstractModuleImpl {
 
-	private static final int DBUSERS_PER_MULTI_OPTION = 5;
-
 	@Override
 	public AbstractEntity add(AbstractEntity newEntity) throws HSAdminException {
 		UnixUser loginUser = getTransaction().getLoginUser();
@@ -40,7 +39,7 @@ public class PgSqlUserModuleImpl extends AbstractModuleImpl {
 		//TODO: Needs better implementation
 		Query qDatabaseUsers = em.createQuery("SELECT obj FROM DatabaseUser obj WHERE obj.pac.id = :pacId");
 		qDatabaseUsers.setParameter("pacId", pac.getId());
-		if (qDatabaseUsers.getResultList().size() >= DBUSERS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qDatabaseUsers.getResultList().size() >= MultiOption.DATABASEUSERS_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included database users exceeded");
 		}			
 		user.setPac(pac);
diff --git a/hsarback/src/de/hsadmin/mods/email/EMailAliasModuleImpl.java b/hsarback/src/de/hsadmin/mods/email/EMailAliasModuleImpl.java
index 1cb4fb0..0587de2 100644
--- a/hsarback/src/de/hsadmin/mods/email/EMailAliasModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/email/EMailAliasModuleImpl.java
@@ -10,13 +10,12 @@ import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.AuthorisationException;
 import de.hsadmin.core.model.HSAdminException;
 import de.hsadmin.core.model.Transaction;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 import de.hsadmin.mods.user.UnixUser;
 
 public class EMailAliasModuleImpl extends AbstractModuleImpl {
 
-	private static final int UNIXUSERS_PER_MULTI_OPTION = 250;
-
 	@Override
 	public List<AbstractEntity> search(Class<? extends AbstractEntity> entityClass,
 			String condition, String orderBy) throws HSAdminException {
@@ -56,7 +55,7 @@ public class EMailAliasModuleImpl extends AbstractModuleImpl {
 		qEmailAliases.setParameter("pacId", pac.getId());
 		Query qEmailAddresses = em.createQuery("SELECT obj FROM EMailAddresses obj WHERE obj.domain.user.pac.id = :pacId");
 		qEmailAddresses.setParameter("pacId", pac.getId());		
-		if (qEmailAliases.getResultList().size() + qEmailAddresses.getResultList().size() >= UNIXUSERS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qEmailAliases.getResultList().size() + qEmailAddresses.getResultList().size() >= MultiOption.EMAIL_ITEMS_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included email addresses/aliases exceeded");
 		}			
 		alias.setPac(pac);
diff --git a/hsarback/src/de/hsadmin/mods/user/UnixUserModuleImpl.java b/hsarback/src/de/hsadmin/mods/user/UnixUserModuleImpl.java
index 28c014b..a8c2c20 100644
--- a/hsarback/src/de/hsadmin/mods/user/UnixUserModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/user/UnixUserModuleImpl.java
@@ -11,12 +11,11 @@ import de.hsadmin.core.model.AbstractEntity;
 import de.hsadmin.core.model.AbstractModuleImpl;
 import de.hsadmin.core.model.HSAdminException;
 import de.hsadmin.core.model.Transaction;
+import de.hsadmin.hostsharing.MultiOption;
 import de.hsadmin.mods.pac.Pac;
 
 public class UnixUserModuleImpl extends AbstractModuleImpl {
 
-	private static final int UNIXUSERS_PER_MULTI_OPTION = 50;
-
 	public UnixUserModuleImpl() {
 	}
 
@@ -135,7 +134,7 @@ public class UnixUserModuleImpl extends AbstractModuleImpl {
 		//TODO: Needs better implementation
 		Query qUnixUsers = em.createQuery("SELECT obj FROM UnixUsers obj WHERE obj.id = :pacId");
 		qUnixUsers.setParameter("pacId", pac.getId());
-		if (qUnixUsers.getResultList().size() >= UNIXUSERS_PER_MULTI_OPTION * pac.getQuantityByComponentName("MULTI")) {
+		if (qUnixUsers.getResultList().size() >= MultiOption.UNIXUSERS_PER_OPTION * pac.getQuantityByComponentName("MULTI")) {
 			throw new HSAdminException("included unix users exceeded");
 		}	
 		// don't move this up, it will update the new entity still with wrong