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diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/AbstractImage.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/AbstractImage.java
new file mode 100644
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+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/AbstractImage.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.g2d.image.impl;
+
+import org.simantics.g2d.image.Image;
+import org.simantics.utils.datastructures.ListenerList;
+
+/**
+ * 
+ *
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public abstract class AbstractImage implements Image {
+
+    ListenerList<ImageListener> list = null;
+
+    @Override
+    public void addImageListener(ImageListener listener) {
+        getListenerList().add(listener);
+    }
+
+    @Override
+    public void removeImageListener(ImageListener listener) {
+        getListenerList().remove(listener);
+    }
+
+    protected void notifyChanged()
+    {
+        if (list == null)
+            return;
+        for (ImageListener l : list.getListeners())
+            l.onContentChangedNotification(this);
+    }
+
+    private synchronized ListenerList<ImageListener> getListenerList()
+    {
+        if (list==null) list = new ListenerList<ImageListener>(ImageListener.class);
+        return list;
+    }
+}
+