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diff --git a/org.simantics.g3d.occ/src/org/simantics/proconf/g3d/occ/Activator.java b/org.simantics.g3d.occ/src/org/simantics/proconf/g3d/occ/Activator.java
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+/*******************************************************************************
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.
+ * 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.proconf.g3d.occ;
+
+import org.eclipse.ui.plugin.AbstractUIPlugin;
+import org.osgi.framework.BundleContext;
+import org.simantics.proconf.g3d.csg.stubs.CSGResource;
+import org.simantics.db.Graph;
+import org.simantics.db.GraphRequestAdapter;
+import org.simantics.db.GraphRequestStatus;
+import org.simantics.proconf.g3d.stubs.G3DResource;
+import org.simantics.proconf.ui.ProConfUI;
+
+/**
+ * The activator class controls the plug-in life cycle
+ */
+public class Activator extends AbstractUIPlugin {
+
+	// The plug-in ID
+	public static final String PLUGIN_ID = "org.simantics.proconf.g3d.occ";
+
+	// The shared instance
+	private static Activator plugin;
+	
+	/**
+	 * The constructor
+	 */
+	public Activator() {
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
+	 */
+	public void start(BundleContext context) throws Exception {
+		super.start(context);
+		plugin = this;
+		
+		ProConfUI.getSession().syncRead(new GraphRequestAdapter() {
+			@Override
+			public GraphRequestStatus perform(Graph g) throws Exception {
+				OccResources.csgResource = CSGResource.getInstance(g);
+				OccResources.g3dResource = G3DResource.getInstance(g);
+				return GraphRequestStatus.transactionComplete();
+			}
+		});
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
+	 */
+	public void stop(BundleContext context) throws Exception {
+		plugin = null;
+		super.stop(context);
+	}
+
+	/**
+	 * Returns the shared instance
+	 *
+	 * @return the shared instance
+	 */
+	public static Activator getDefault() {
+		return plugin;
+	}
+
+}