diff --git a/scm-core/src/main/java/sonia/scm/ModelObject.java b/scm-core/src/main/java/sonia/scm/ModelObject.java
index 76ba021e67..cca9608ceb 100644
--- a/scm-core/src/main/java/sonia/scm/ModelObject.java
+++ b/scm-core/src/main/java/sonia/scm/ModelObject.java
@@ -53,5 +53,11 @@ public interface ModelObject
    *
    * @return unique id
    */
-  public String getId();
+  String getId();
+
+  void setLastModified(Long timestamp);
+
+  Long getCreationDate();
+
+  void setCreationDate(Long timestamp);
 }
diff --git a/scm-core/src/main/java/sonia/scm/group/GroupAlreadyExistsException.java b/scm-core/src/main/java/sonia/scm/group/GroupAlreadyExistsException.java
index e63ee1d78b..2b3c73535e 100644
--- a/scm-core/src/main/java/sonia/scm/group/GroupAlreadyExistsException.java
+++ b/scm-core/src/main/java/sonia/scm/group/GroupAlreadyExistsException.java
@@ -42,15 +42,9 @@ package sonia.scm.group;
 public class GroupAlreadyExistsException extends GroupException
 {
 
-  /** Field description */
   private static final long serialVersionUID = 4042878550219750430L;
   
-  /**
-   * Constructs a new instance.
-   * 
-   * @param name The name (aka id) of the group
-   */
-  public GroupAlreadyExistsException(String name) {
-    super(name + " group already exists");
+  public GroupAlreadyExistsException(Group group) {
+    super(group.getName() + " group already exists");
   }
 }
diff --git a/scm-core/src/main/java/sonia/scm/group/GroupNotFoundException.java b/scm-core/src/main/java/sonia/scm/group/GroupNotFoundException.java
index d4c06a1559..d1769da9e9 100644
--- a/scm-core/src/main/java/sonia/scm/group/GroupNotFoundException.java
+++ b/scm-core/src/main/java/sonia/scm/group/GroupNotFoundException.java
@@ -53,6 +53,6 @@ public class GroupNotFoundException extends GroupException
    *
    */
   public GroupNotFoundException() {
-    super("group does not exists");
+    super("group does not exist");
   }
 }
diff --git a/scm-core/src/main/java/sonia/scm/repository/RepositoryNotFoundException.java b/scm-core/src/main/java/sonia/scm/repository/RepositoryNotFoundException.java
index f1649efb43..4160fb1424 100644
--- a/scm-core/src/main/java/sonia/scm/repository/RepositoryNotFoundException.java
+++ b/scm-core/src/main/java/sonia/scm/repository/RepositoryNotFoundException.java
@@ -52,17 +52,11 @@ public class RepositoryNotFoundException extends RepositoryException
    * error detail message.
    *
    */
-  public RepositoryNotFoundException() {}
+  public RepositoryNotFoundException() {
+    super("repository does not exist");
+  }
 
-  /**
-   * Constructs a new {@link RepositoryNotFoundException} with the specified  
-   * error detail message.
-   *
-   *
-   * @param message error detail message
-   */
-  public RepositoryNotFoundException(String message)
-  {
-    super(message);
+  public RepositoryNotFoundException(String repositoryId) {
+    super("repository with id " + repositoryId + " does not exist");
   }
 }
diff --git a/scm-core/src/main/java/sonia/scm/repository/api/RepositoryServiceFactory.java b/scm-core/src/main/java/sonia/scm/repository/api/RepositoryServiceFactory.java
index 5bd737a85a..315156db0d 100644
--- a/scm-core/src/main/java/sonia/scm/repository/api/RepositoryServiceFactory.java
+++ b/scm-core/src/main/java/sonia/scm/repository/api/RepositoryServiceFactory.java
@@ -37,20 +37,19 @@ package sonia.scm.repository.api;
 
 import com.github.legman.ReferenceType;
 import com.github.legman.Subscribe;
-
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import com.google.common.collect.Sets;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import sonia.scm.HandlerEventType;
 import sonia.scm.cache.Cache;
 import sonia.scm.cache.CacheManager;
 import sonia.scm.config.ScmConfiguration;
+import sonia.scm.event.ScmEventBus;
+import sonia.scm.repository.ClearRepositoryCacheEvent;
 import sonia.scm.repository.PostReceiveRepositoryHookEvent;
 import sonia.scm.repository.PreProcessorUtil;
 import sonia.scm.repository.Repository;
@@ -63,11 +62,9 @@ import sonia.scm.repository.spi.RepositoryServiceProvider;
 import sonia.scm.repository.spi.RepositoryServiceResolver;
 import sonia.scm.security.ScmSecurityException;
 
-//~--- JDK imports ------------------------------------------------------------
-
 import java.util.Set;
-import sonia.scm.event.ScmEventBus;
-import sonia.scm.repository.ClearRepositoryCacheEvent;
+
+//~--- JDK imports ------------------------------------------------------------
 
 /**
  * The {@link RepositoryServiceFactory} is the entrypoint of the repository api.
@@ -179,8 +176,7 @@ public final class RepositoryServiceFactory
 
     if (repository == null)
     {
-      throw new RepositoryNotFoundException(
-        "could not find a repository with id ".concat(repositoryId));
+      throw new RepositoryNotFoundException(repositoryId);
     }
 
     return create(repository);
diff --git a/scm-core/src/main/java/sonia/scm/user/UserAlreadyExistsException.java b/scm-core/src/main/java/sonia/scm/user/UserAlreadyExistsException.java
index 52b91fa229..1c77cb4f86 100644
--- a/scm-core/src/main/java/sonia/scm/user/UserAlreadyExistsException.java
+++ b/scm-core/src/main/java/sonia/scm/user/UserAlreadyExistsException.java
@@ -41,19 +41,11 @@ package sonia.scm.user;
 public class UserAlreadyExistsException extends UserException
 {
 
-  /** Field description */
   private static final long serialVersionUID = 9182294539718090814L;
 
   //~--- constructors ---------------------------------------------------------
 
-  /**
-   * Constructs a new instance.
-   *
-   * @param name The name (aka id) of the user
-   * @since 1.5
-   */
-  public UserAlreadyExistsException(String name)
-  {
-    super(name + " user already exists");
+  public UserAlreadyExistsException(User user) {
+    super(user.getName() + " user already exists");
   }
 }
diff --git a/scm-core/src/main/java/sonia/scm/user/UserNotFoundException.java b/scm-core/src/main/java/sonia/scm/user/UserNotFoundException.java
index e5755c2546..0f11615987 100644
--- a/scm-core/src/main/java/sonia/scm/user/UserNotFoundException.java
+++ b/scm-core/src/main/java/sonia/scm/user/UserNotFoundException.java
@@ -52,6 +52,6 @@ public class UserNotFoundException extends UserException
    *
    */
   public UserNotFoundException() {
-    super("user does not exists");
+    super("user does not exist");
   }
 }
diff --git a/scm-webapp/src/main/java/sonia/scm/ManagerDaoAdapter.java b/scm-webapp/src/main/java/sonia/scm/ManagerDaoAdapter.java
new file mode 100644
index 0000000000..0f26a691b3
--- /dev/null
+++ b/scm-webapp/src/main/java/sonia/scm/ManagerDaoAdapter.java
@@ -0,0 +1,59 @@
+package sonia.scm;
+
+import com.github.sdorra.ssp.PermissionCheck;
+import sonia.scm.util.AssertUtil;
+
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+public class ManagerDaoAdapter<T extends ModelObject, E extends Exception> {
+
+  private final GenericDAO<T> dao;
+  private final Supplier<E> notFoundException;
+  private final Function<T, E> alreadyExistsException;
+
+  public ManagerDaoAdapter(GenericDAO<T> dao, Supplier<E> notFoundException, Function<T, E> alreadyExistsException) {
+    this.dao = dao;
+    this.notFoundException = notFoundException;
+    this.alreadyExistsException = alreadyExistsException;
+  }
+
+  public void modify(T object, Function<T, PermissionCheck> permissionCheck, AroundHandler<T, E> beforeUpdate, AroundHandler<T, E> afterUpdate) throws E {
+    String name = object.getId();
+
+    T notModified = dao.get(name);
+    if (notModified != null) {
+      permissionCheck.apply(notModified).check();
+      AssertUtil.assertIsValid(object);
+
+      beforeUpdate.handle(notModified);
+
+      object.setLastModified(System.currentTimeMillis());
+      object.setCreationDate(notModified.getCreationDate());
+
+      dao.modify(object);
+
+      afterUpdate.handle(notModified);
+    } else {
+      throw notFoundException.get();
+    }
+  }
+
+  public T create(T newObject, Supplier<PermissionCheck> permissionCheck, AroundHandler<T, E> beforeCreate, AroundHandler<T, E> afterCreate) throws E {
+    permissionCheck.get().check();
+    AssertUtil.assertIsValid(newObject);
+    if (dao.contains(newObject)) {
+      throw alreadyExistsException.apply(newObject);
+    }
+    newObject.setCreationDate(System.currentTimeMillis());
+    beforeCreate.handle(newObject);
+    dao.add(newObject);
+    afterCreate.handle(newObject);
+    return newObject;
+  }
+
+  @FunctionalInterface
+  public interface AroundHandler<T extends ModelObject, E extends Exception> {
+    void handle(T notModified) throws E;
+  }
+}
diff --git a/scm-webapp/src/main/java/sonia/scm/group/DefaultGroupManager.java b/scm-webapp/src/main/java/sonia/scm/group/DefaultGroupManager.java
index ed1d7723b2..5c6681cc30 100644
--- a/scm-webapp/src/main/java/sonia/scm/group/DefaultGroupManager.java
+++ b/scm-webapp/src/main/java/sonia/scm/group/DefaultGroupManager.java
@@ -43,6 +43,7 @@ import com.google.inject.Singleton;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.HandlerEventType;
+import sonia.scm.ManagerDaoAdapter;
 import sonia.scm.SCMContextProvider;
 import sonia.scm.TransformFilter;
 import sonia.scm.search.SearchRequest;
@@ -84,6 +85,10 @@ public class DefaultGroupManager extends AbstractGroupManager
   public DefaultGroupManager(GroupDAO groupDAO)
   {
     this.groupDAO = groupDAO;
+    this.managerDaoAdapter = new ManagerDaoAdapter<>(
+      groupDAO,
+      GroupNotFoundException::new,
+      GroupAlreadyExistsException::new);
   }
 
   //~--- methods --------------------------------------------------------------
@@ -101,46 +106,23 @@ public class DefaultGroupManager extends AbstractGroupManager
     // do nothing
   }
 
-  /**
-   * Method description
-   *
-   *
-   * @param group
-   *
-   * @throws GroupException
-   * @throws IOException
-   */
   @Override
-  public Group create(Group group) throws GroupException
-  {
+  public Group create(Group group) throws GroupException {
     String type = group.getType();
-
-    if (Util.isEmpty(type))
-    {
+    if (Util.isEmpty(type)) {
       group.setType(groupDAO.getType());
     }
 
-    String name = group.getName();
-    
-    if (logger.isInfoEnabled())
-    {
-      logger.info("create group {} of type {}", name,
-        group.getType());
-    }
-
-    GroupPermissions.create().check();
-    
-    if (groupDAO.contains(name))
-    {
-      throw new GroupAlreadyExistsException(name);
-    }
+    logger.info("create group {} of type {}", group.getName(), group.getType());
 
     removeDuplicateMembers(group);
-    group.setCreationDate(System.currentTimeMillis());
-    fireEvent(HandlerEventType.BEFORE_CREATE, group);
-    groupDAO.add(group);
-    fireEvent(HandlerEventType.CREATE, group);
-    return group;
+
+    return managerDaoAdapter.create(
+      group,
+      GroupPermissions::create,
+      newGroup -> fireEvent(HandlerEventType.BEFORE_CREATE, newGroup),
+      newGroup -> fireEvent(HandlerEventType.CREATE, newGroup)
+    );
   }
 
   /**
@@ -195,31 +177,18 @@ public class DefaultGroupManager extends AbstractGroupManager
    * @throws IOException
    */
   @Override
-  public void modify(Group group) throws GroupException
-  {
-    if (logger.isInfoEnabled())
-    {
-      logger.info("modify group {} of type {}", group.getName(),
-        group.getType());
-    }
+  public void modify(Group group) throws GroupException {
+    logger.info("modify group {} of type {}", group.getName(), group.getType());
 
-    String name = group.getName();
-    GroupPermissions.modify().check(name);
-
-    Group notModified = groupDAO.get(name);
-    if (notModified != null)
-    {
-      removeDuplicateMembers(group);
-      fireEvent(HandlerEventType.BEFORE_MODIFY, group, notModified);
-      group.setLastModified(System.currentTimeMillis());
-      group.setCreationDate(notModified.getCreationDate());
-      groupDAO.modify(group);
-      fireEvent(HandlerEventType.MODIFY, group, notModified);
-    }
-    else
-    {
-      throw new GroupNotFoundException();
-    }
+    managerDaoAdapter.modify(
+      group,
+      GroupPermissions::modify,
+      notModified -> {
+        removeDuplicateMembers(group);
+        fireEvent(HandlerEventType.BEFORE_MODIFY, group, notModified);
+      },
+      notModified -> fireEvent(HandlerEventType.MODIFY, group, notModified)
+    );
   }
 
   /**
@@ -458,4 +427,5 @@ public class DefaultGroupManager extends AbstractGroupManager
 
   /** Field description */
   private GroupDAO groupDAO;
+  private final ManagerDaoAdapter<Group, GroupException> managerDaoAdapter;
 }
diff --git a/scm-webapp/src/main/java/sonia/scm/repository/DefaultRepositoryManager.java b/scm-webapp/src/main/java/sonia/scm/repository/DefaultRepositoryManager.java
index ffcf3d8dc3..13f0ce79c3 100644
--- a/scm-webapp/src/main/java/sonia/scm/repository/DefaultRepositoryManager.java
+++ b/scm-webapp/src/main/java/sonia/scm/repository/DefaultRepositoryManager.java
@@ -45,6 +45,7 @@ import org.slf4j.LoggerFactory;
 import sonia.scm.ArgumentIsInvalidException;
 import sonia.scm.ConfigurationException;
 import sonia.scm.HandlerEventType;
+import sonia.scm.ManagerDaoAdapter;
 import sonia.scm.SCMContextProvider;
 import sonia.scm.Type;
 import sonia.scm.config.ScmConfiguration;
@@ -90,6 +91,7 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
   private final Set<Type> types;
   private RepositoryMatcher repositoryMatcher;
   private NamespaceStrategy namespaceStrategy;
+  private final ManagerDaoAdapter<Repository, RepositoryException> managerDaoAdapter;
 
 
   @Inject
@@ -116,6 +118,10 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
     for (RepositoryHandler handler : handlerSet) {
       addHandler(contextProvider, handler);
     }
+    managerDaoAdapter = new ManagerDaoAdapter<>(
+      repositoryDAO,
+      RepositoryNotFoundException::new,
+      RepositoryAlreadyExistsException::create);
   }
 
 
@@ -128,55 +134,28 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
     }
   }
 
-  /**
-   * Method description
-   *
-   *
-   * @param repository
-   * @param initRepository
-   *
-   * @throws IOException
-   * @throws RepositoryException
-   */
-  public Repository create(Repository repository, boolean initRepository)
-    throws RepositoryException {
-    logger.info("create repository {} of type {}", repository.getName(),
-      repository.getType());
-
-    RepositoryPermissions.create().check();
-    AssertUtil.assertIsValid(repository);
-
-    if (repositoryDAO.contains(repository)) {
-      throw RepositoryAlreadyExistsException.create(repository);
-    }
-
-    repository.setId(keyGenerator.createKey());
-    repository.setCreationDate(System.currentTimeMillis());
-    repository.setNamespace(namespaceStrategy.getNamespace());
-
-    if (initRepository) {
-      getHandler(repository).create(repository);
-    }
-
-    fireEvent(HandlerEventType.BEFORE_CREATE, repository);
-    repositoryDAO.add(repository);
-    fireEvent(HandlerEventType.CREATE, repository);
-    return repository;
+  @Override
+  public Repository create(Repository repository) throws RepositoryException {
+    return create(repository, true);
   }
 
-  /**
-   * Method description
-   *
-   *
-   * @param repository
-   *
-   * @throws IOException
-   * @throws RepositoryException
-   */
-  @Override
-  public Repository create(Repository repository)
-    throws RepositoryException {
-    return create(repository, true);
+  public Repository create(Repository repository, boolean initRepository) throws RepositoryException {
+    repository.setId(keyGenerator.createKey());
+    repository.setNamespace(namespaceStrategy.getNamespace());
+
+    logger.info("create repository {} of type {} in namespace {}", repository.getName(), repository.getType(), repository.getNamespace());
+
+    return managerDaoAdapter.create(
+      repository,
+      RepositoryPermissions::create,
+      newRepository -> {
+        if (initRepository) {
+          getHandler(newRepository).create(newRepository);
+        }
+        fireEvent(HandlerEventType.BEFORE_CREATE, newRepository);
+      },
+      newRepository -> fireEvent(HandlerEventType.CREATE, newRepository)
+    );
   }
 
   /**
@@ -209,8 +188,7 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
       repositoryDAO.delete(repository);
       fireEvent(HandlerEventType.DELETE, repository);
     } else {
-      throw new RepositoryNotFoundException(
-        "repository ".concat(repository.getName()).concat(" not found"));
+      throw new RepositoryNotFoundException();
     }
   }
 
@@ -249,30 +227,18 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
    * @throws RepositoryException
    */
   @Override
-  public void modify(Repository repository)
-    throws RepositoryException {
-    if (logger.isInfoEnabled()) {
-      logger.info("modify repository {} of type {}", repository.getName(),
-        repository.getType());
-    }
+  public void modify(Repository repository) throws RepositoryException {
+    logger.info("modify repository {} of type {}", repository.getName(), repository.getType());
 
-    AssertUtil.assertIsValid(repository);
-
-    Repository oldRepository = repositoryDAO.get(repository.getType(),
-      repository.getName());
-
-    if (oldRepository != null) {
-      RepositoryPermissions.modify(oldRepository).check();
-      fireEvent(HandlerEventType.BEFORE_MODIFY, repository, oldRepository);
-      repository.setLastModified(System.currentTimeMillis());
-      repository.setCreationDate(oldRepository.getCreationDate());
-      getHandler(repository).modify(repository);
-      repositoryDAO.modify(repository);
-      fireEvent(HandlerEventType.MODIFY, repository, oldRepository);
-    } else {
-      throw new RepositoryNotFoundException(
-        "repository ".concat(repository.getName()).concat(" not found"));
-    }
+    managerDaoAdapter.modify(
+      repository,
+      RepositoryPermissions::modify,
+      notModified -> {
+        fireEvent(HandlerEventType.BEFORE_MODIFY, repository, notModified);
+        getHandler(repository).modify(repository);
+      },
+      notModified -> fireEvent(HandlerEventType.MODIFY, repository, notModified)
+    );
   }
 
   /**
@@ -296,8 +262,7 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
     if (fresh != null) {
       fresh.copyProperties(repository);
     } else {
-      throw new RepositoryNotFoundException(
-        "repository ".concat(repository.getName()).concat(" not found"));
+      throw new RepositoryNotFoundException();
     }
   }
 
@@ -638,5 +603,4 @@ public class DefaultRepositoryManager extends AbstractRepositoryManager {
 
     return handler;
   }
-
 }
diff --git a/scm-webapp/src/main/java/sonia/scm/user/DefaultUserManager.java b/scm-webapp/src/main/java/sonia/scm/user/DefaultUserManager.java
index 5a13a7fef8..2b63a33a89 100644
--- a/scm-webapp/src/main/java/sonia/scm/user/DefaultUserManager.java
+++ b/scm-webapp/src/main/java/sonia/scm/user/DefaultUserManager.java
@@ -41,11 +41,11 @@ import com.google.inject.Singleton;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.HandlerEventType;
+import sonia.scm.ManagerDaoAdapter;
 import sonia.scm.SCMContextProvider;
 import sonia.scm.TransformFilter;
 import sonia.scm.search.SearchRequest;
 import sonia.scm.search.SearchUtil;
-import sonia.scm.util.AssertUtil;
 import sonia.scm.util.CollectionAppender;
 import sonia.scm.util.IOUtil;
 import sonia.scm.util.Util;
@@ -96,6 +96,10 @@ public class DefaultUserManager extends AbstractUserManager
   public DefaultUserManager(UserDAO userDAO)
   {
     this.userDAO = userDAO;
+    this.managerDaoAdapter = new ManagerDaoAdapter<>(
+      userDAO,
+      UserNotFoundException::new,
+      UserAlreadyExistsException::new);
   }
 
   //~--- methods --------------------------------------------------------------
@@ -137,33 +141,20 @@ public class DefaultUserManager extends AbstractUserManager
    * @throws UserException
    */
   @Override
-  public User create(User user) throws UserException
-  {
+  public User create(User user) throws UserException {
     String type = user.getType();
-
-    if (Util.isEmpty(type))
-    {
+    if (Util.isEmpty(type)) {
       user.setType(userDAO.getType());
     }
 
-    if (logger.isInfoEnabled())
-    {
-      logger.info("create user {} of type {}", user.getName(), user.getType());
-    }
+    logger.info("create user {} of type {}", user.getName(), user.getType());
 
-    UserPermissions.create().check();
-
-    if (userDAO.contains(user.getName()))
-    {
-      throw new UserAlreadyExistsException(user.getName());
-    }
-
-    AssertUtil.assertIsValid(user);
-    user.setCreationDate(System.currentTimeMillis());
-    fireEvent(HandlerEventType.BEFORE_CREATE, user);
-    userDAO.add(user);
-    fireEvent(HandlerEventType.CREATE, user);
-    return user;
+    return managerDaoAdapter.create(
+      user,
+      UserPermissions::create,
+      newUser -> fireEvent(HandlerEventType.BEFORE_CREATE, newUser),
+      newUser -> fireEvent(HandlerEventType.CREATE, newUser)
+    );
   }
 
   /**
@@ -227,27 +218,13 @@ public class DefaultUserManager extends AbstractUserManager
   @Override
   public void modify(User user) throws UserException
   {
-    String name = user.getName();
-    if (logger.isInfoEnabled())
-    {
-      logger.info("modify user {} of type {}", user.getName(), user.getType());
-    }
-    
-    UserPermissions.modify(user).check();
-    User notModified = userDAO.get(name);
-    if (notModified != null)
-    {
-      AssertUtil.assertIsValid(user);
-      fireEvent(HandlerEventType.BEFORE_MODIFY, user, notModified);
-      user.setLastModified(System.currentTimeMillis());
-      user.setCreationDate(notModified.getCreationDate());
-      userDAO.modify(user);
-      fireEvent(HandlerEventType.MODIFY, user, notModified);
-    }
-    else
-    {
-      throw new UserNotFoundException();
-    }
+    logger.info("modify user {} of type {}", user.getName(), user.getType());
+
+    managerDaoAdapter.modify(
+      user,
+      UserPermissions::modify,
+      notModified -> fireEvent(HandlerEventType.BEFORE_MODIFY, user, notModified),
+      notModified -> fireEvent(HandlerEventType.MODIFY, user, notModified));
   }
 
   /**
@@ -497,6 +474,6 @@ public class DefaultUserManager extends AbstractUserManager
 
   //~--- fields ---------------------------------------------------------------
 
-  /** Field description */
   private final UserDAO userDAO;
+  private final ManagerDaoAdapter<User, UserException> managerDaoAdapter;
 }
diff --git a/scm-webapp/src/test/java/sonia/scm/api/rest/resources/AbstractManagerResourceTest.java b/scm-webapp/src/test/java/sonia/scm/api/rest/resources/AbstractManagerResourceTest.java
index e8421bc417..b3e931188a 100644
--- a/scm-webapp/src/test/java/sonia/scm/api/rest/resources/AbstractManagerResourceTest.java
+++ b/scm-webapp/src/test/java/sonia/scm/api/rest/resources/AbstractManagerResourceTest.java
@@ -105,6 +105,21 @@ public class AbstractManagerResourceTest {
       return id;
     }
 
+    @Override
+    public void setLastModified(Long timestamp) {
+
+    }
+
+    @Override
+    public Long getCreationDate() {
+      return null;
+    }
+
+    @Override
+    public void setCreationDate(Long timestamp) {
+
+    }
+
     @Override
     public Long getLastModified() {
       return null;