diff --git a/Modules/QtWidgets/include/QmitkAbstractDataStorageModel.h b/Modules/QtWidgets/include/QmitkAbstractDataStorageModel.h
index 57c82a47a7..0b9c1a1145 100644
--- a/Modules/QtWidgets/include/QmitkAbstractDataStorageModel.h
+++ b/Modules/QtWidgets/include/QmitkAbstractDataStorageModel.h
@@ -1,82 +1,83 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical Image Computing.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #ifndef QMITKABSTRACTDATASTORAGEMODEL_H
 #define QMITKABSTRACTDATASTORAGEMODEL_H
 
 #include <MitkQtWidgetsExports.h>
 
 // mitk core
 #include <mitkDataStorage.h>
 #include <mitkNodePredicateBase.h>
 
 // qt
 #include <QAbstractItemModel>
 
 /*
 * @brief This abstract class extends the 'QAbstractItemModel' to accept an 'mitk::DataStorage' and a 'mitk::NodePredicateBase'.,
 *   It registers itself as a node event listener of the data storage.
 *   The 'QmitkAbstractDataStorageModel' provides three empty functions, 'NodeAdded', 'NodeChanged' and 'NodeRemoved', that
 *   may be implemented by the subclasses. These functions allow to react to the 'AddNodeEvent', 'ChangedNodeEvent' and
 *   'RemoveNodeEvent' of the data storage. This might be useful to force an update on the custom view to correctly
 *   represent the content of the data storage.
 *
 *   A concrete implementations of this class is used to store the temporarily shown data nodes of the data storage.
 *   These nodes may be a subset of all the nodes inside the data storage, if a specific node predicate is set.
 *
 *   A model that implements this class has to return mitk::DataNode::Pointer objects for model indexes when the
 *   role is QmitkDataNodeRole.
 */
 class MITKQTWIDGETS_EXPORT QmitkAbstractDataStorageModel : public QAbstractItemModel
 {
+  Q_OBJECT
 
 public:
 
   virtual ~QmitkAbstractDataStorageModel();
   /*
   * @brief Sets the data storage and adds listener for node events.
   *
   * @par dataStorage      A pointer to the data storage to set.
   */
   void SetDataStorage(mitk::DataStorage* dataStorage);
 
   mitk::DataStorage* GetDataStorage() { return m_DataStorage; }
   /*
   * @brief Sets the node predicate and updates the model data, according to the node predicate.
   *
   * @par nodePredicate    A pointer to node predicate.
   */
   void SetNodePredicate(mitk::NodePredicateBase* nodePredicate);
 
   mitk::NodePredicateBase* GetNodePredicate() { return m_NodePredicate; }
 
 protected:
 
   virtual void DataStorageChanged() = 0;
   virtual void NodePredicateChanged() = 0;
 
   virtual void NodeAdded(const mitk::DataNode* node) = 0;
   virtual void NodeChanged(const mitk::DataNode* node) = 0;
   virtual void NodeRemoved(const mitk::DataNode* node) = 0;
 
   QmitkAbstractDataStorageModel(QObject* parent = nullptr);
   QmitkAbstractDataStorageModel(mitk::DataStorage* dataStorage, QObject* parent = nullptr);
   mitk::DataStorage* m_DataStorage;
   mitk::NodePredicateBase::Pointer m_NodePredicate;
 
 };
 
 #endif // QMITKABSTRACTDATASTORAGEMODEL_H
diff --git a/Modules/QtWidgets/include/QmitkDataStorageDefaultListModel.h b/Modules/QtWidgets/include/QmitkDataStorageDefaultListModel.h
index 7dbd119978..cbfdf81916 100644
--- a/Modules/QtWidgets/include/QmitkDataStorageDefaultListModel.h
+++ b/Modules/QtWidgets/include/QmitkDataStorageDefaultListModel.h
@@ -1,81 +1,82 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical Image Computing.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #ifndef QMITKDATASTORAGEDEFAULTLISTMODEL_H
 #define QMITKDATASTORAGEDEFAULTLISTMODEL_H
 
 #include <MitkQtWidgetsExports.h>
 
 // qt widgets module
 #include <QmitkAbstractDataStorageModel.h>
 
 /**
 * @brief The 'QmitkDataStorageDefaultListModel' is a basic list model, derived from the 'QmitkAbstractDataStorageModel'.
 *        It provides functions to accept a data storage and a node predicate in order to customize the model data nodes.
 *        Furthermore it overrides the functions of 'QAbstractItemModel' to create a simple qt list model.
-*        This model can be used inside a 'QmitkDataStorageSelectionConnector'.
+*        This model can be used in conjunction with a 'QmitkDataStorageSelectionConnector'.
 */
 class MITKQTWIDGETS_EXPORT QmitkDataStorageDefaultListModel : public QmitkAbstractDataStorageModel
 {
+  Q_OBJECT
 
 public:
 
   QmitkDataStorageDefaultListModel(QObject *parent);
 
   // override from 'QmitkAbstractDataStorageModel'
   /*
   * @brief See 'QmitkAbstractDataStorageModel'
   */
   void DataStorageChanged() override;
   /*
   * @brief See 'QmitkAbstractDataStorageModel'
   */
   void NodePredicateChanged() override;
   /*
   * @brief See 'QmitkAbstractDataStorageModel'
   */
   void NodeAdded(const mitk::DataNode* node) override;
   /*
   * @brief See 'QmitkAbstractDataStorageModel'
   */
   void NodeChanged(const mitk::DataNode* node) override;
   /*
   * @brief See 'QmitkAbstractDataStorageModel'
   */
   void NodeRemoved(const mitk::DataNode* node) override;
 
   // override pure virtual from 'QAbstractItemModel'
   QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
   QModelIndex parent(const QModelIndex &child) const override;
 
   int rowCount(const QModelIndex &parent = QModelIndex()) const override;
   int columnCount(const QModelIndex &parent = QModelIndex()) const override;
 
   QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
 
   // override for customization
   QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
   Qt::ItemFlags flags(const QModelIndex &index) const override;
 
 private:
 
   void UpdateModelData();
 
   std::vector<mitk::DataNode::Pointer> m_DataNodes;
 
 };
 
 #endif // QMITKDATASTORAGEDEFAULTLISTMODEL_H