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diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4WorkbenchUtils.java b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4WorkbenchUtils.java
new file mode 100644
index 000000000..217185ddc
--- /dev/null
+++ b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4WorkbenchUtils.java
@@ -0,0 +1,145 @@
+package org.simantics.ui.workbench.e4;
+
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.e4.core.contexts.IEclipseContext;
+import org.eclipse.e4.ui.model.application.MApplication;
+import org.eclipse.e4.ui.model.application.ui.MUIElement;
+import org.eclipse.e4.ui.model.application.ui.advanced.MArea;
+import org.eclipse.e4.ui.model.application.ui.advanced.MPlaceholder;
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;
+import org.eclipse.e4.ui.model.application.ui.basic.MPartSashContainerElement;
+import org.eclipse.e4.ui.model.application.ui.basic.MPartStack;
+import org.eclipse.e4.ui.workbench.modeling.EModelService;
+import org.eclipse.e4.ui.workbench.modeling.EPartService;
+import org.eclipse.e4.ui.workbench.modeling.EPartService.PartState;
+import org.eclipse.ui.PlatformUI;
+import org.simantics.db.Resource;
+import org.simantics.utils.datastructures.ArrayMap;
+
+/**
+ * @author Tuukka Lehtonen
+ *
+ */
+public class E4WorkbenchUtils {
+
+    private static final String[] KEYS_RESOURCE = { E4ResourceEditorConstants.KEY_RESOURCE };
+
+    /**
+     * 
+     */
+    private static final String TAG_EDITOR = "Editor";
+
+    /**
+     * The Legacy IDE application ID for the "editor area" partstack. In E3
+     * compatibility mode legacy application the {@link MPartStack} lies under
+     * the shared {@link MArea} (org.eclipse.ui.editorss).
+     * 
+     * <p>
+     * In a pure E4 application this needs to be changed.
+     */
+    public static final String EDITOR_PART_STACK_ID = "org.eclipse.e4.primaryDataStack";
+
+    public static final String EDITOR_AREA_ID = "org.eclipse.ui.editorss";
+
+    /**
+     * @param editorId
+     * @param contributionURI
+     * @param iconURI
+     * @param inputId
+     * @param inputMap
+     */
+    public static MPart openEditor(String editorId, String contributionURI, String iconURI, String inputId, Map<String, Object> inputMap) {
+        if (editorId == null)
+            throw new NullPointerException("null editor ID");
+        if (contributionURI == null)
+            throw new NullPointerException("null contributionURI");
+        if (inputId == null)
+            throw new NullPointerException("null input ID");
+        if (inputMap == null)
+            throw new NullPointerException("null input map");
+
+        IEclipseContext context = PlatformUI.getWorkbench().getService(IEclipseContext.class);
+        EModelService modelService = context.get(EModelService.class);
+        EPartService partService = context.get(EPartService.class);
+        MApplication app = context.get(MApplication.class);
+
+        String editorID = editorId + "_" + inputId;
+
+        List<MPart> parts = modelService.findElements(app, editorID, MPart.class, null);
+        MPart editor = null;
+        if (parts == null || parts.isEmpty()) {
+            editor = modelService.createModelElement(MPart.class);
+            editor.setElementId(editorID);
+            editor.setContributionURI(contributionURI);
+            if (iconURI != null)
+                editor.setIconURI(iconURI);
+            editor.setCloseable(true);
+            editor.getTags().add(TAG_EDITOR);
+            editor.getTransientData().putAll(inputMap);
+
+            MPartStack stack = getEditorPartStack(modelService, app);
+            stack.getChildren().add(editor);
+        } else {
+            editor = parts.get(0);
+        }
+
+        partService.showPart(editor, PartState.ACTIVATE);
+        return editor;
+    }
+
+    /**
+     * @param editorId
+     * @param contributionURI
+     * @param iconURI
+     * @param input
+     */
+    public static MPart openEditor(String editorId, String contributionURI, String iconURI, Resource input) {
+        String inputId = Long.toString(input.getResourceId());
+        Map<String, Object> inputMap = ArrayMap.make(KEYS_RESOURCE, input);
+        return openEditor(editorId, contributionURI, iconURI, inputId, inputMap);
+    }
+
+    /**
+     * @param editorElementId the unique element ID of the part (editor)
+     */
+    public static void closeEditor(String editorElementId) {
+        IEclipseContext context = PlatformUI.getWorkbench().getService(IEclipseContext.class);
+        EModelService modelService = context.get(EModelService.class);
+        MApplication app = context.get(MApplication.class);
+        modelService
+        .findElements(app, editorElementId, MPart.class, null)
+        .forEach(p -> p.getContext().get(EPartService.class).hidePart(p));
+    }
+
+    public static void activatePart(MPart part) {
+        EPartService partService = part.getContext().get(EPartService.class);
+        partService.activate(part);
+    }
+
+    public static MPartStack getEditorPartStack(EModelService modelService, MApplication app) {
+        MPartStack stack = (MPartStack) modelService.find(E4WorkbenchUtils.EDITOR_PART_STACK_ID, app);
+        if (stack == null) {
+            MArea editorArea = null;
+            MUIElement area = modelService.find(E4WorkbenchUtils.EDITOR_AREA_ID, app);
+            if (area instanceof MPlaceholder) {
+                editorArea = (MArea) ((MPlaceholder) area).getRef();
+            } else if (area instanceof MArea) {
+                editorArea = (MArea) area;
+            }
+            if (editorArea == null)
+                throw new IllegalStateException("Shared editor area (" + E4WorkbenchUtils.EDITOR_AREA_ID + ") not found in application model");
+            for (MPartSashContainerElement container : editorArea.getChildren()) {
+                if (container instanceof MPartStack) {
+                    stack = (MPartStack) container;
+                    break;
+                }
+            }
+        }
+        if (stack == null)
+            throw new IllegalStateException("Could not find part stack under editor area.");
+        return stack;
+    }
+
+}