Centering did not work, as interface was not implemented.
diff --git a/org.eclipse.rmf.reqif10.pror.presentation.id/src/org/eclipse/rmf/reqif10/pror/presentation/id/provider/IdConfigurationItemProvider.java b/org.eclipse.rmf.reqif10.pror.presentation.id/src/org/eclipse/rmf/reqif10/pror/presentation/id/provider/IdConfigurationItemProvider.java
index 7c817c2..cda07f5 100644
--- a/org.eclipse.rmf.reqif10.pror.presentation.id/src/org/eclipse/rmf/reqif10/pror/presentation/id/provider/IdConfigurationItemProvider.java
+++ b/org.eclipse.rmf.reqif10.pror.presentation.id/src/org/eclipse/rmf/reqif10/pror/presentation/id/provider/IdConfigurationItemProvider.java
@@ -60,12 +60,14 @@
  * This is the item provider adapter for a {@link org.eclipse.rmf.reqif10.pror.presentation.id.IdConfiguration} object.

  * <!-- begin-user-doc -->

  * <!-- end-user-doc -->

- * @generated

+ * @generated NOT

  */

 public class IdConfigurationItemProvider

 	extends ProrPresentationConfigurationItemProvider

 	implements

-		IEditingDomainItemProvider, IStructuredItemContentProvider, ITreeItemContentProvider, IItemLabelProvider, IItemPropertySource {

+		IEditingDomainItemProvider, IStructuredItemContentProvider,

+		ITreeItemContentProvider, IItemLabelProvider, IItemPropertySource,

+		PresentationEditorInterface {

 	/**

 	 * This constructs an instance from a factory and a notifier.

 	 * <!-- begin-user-doc -->