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diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/provider/ResourceProvider.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/provider/ResourceProvider.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.db.common.provider;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+
+/**
+ * An interface for externalizing the logic of retrieving an arbitrary resource
+ * for some purpose.
+ * 
+ * <p>
+ * A {@link ReadGraph} is provided to allow implementations to browse the graph
+ * in order to retrieve a resource.
+ * </p>
+ * 
+ * <p>
+ * This interface has an asynchronously operating counterpart, {@link AsyncResourceProvider}.
+ * </p>
+ * 
+ * @see ResourceProviders
+ * @see AsyncResourceProvider
+ * 
+ * @author Tuukka Lehtonen
+ */
+public interface ResourceProvider {
+
+    /**
+     * @param graph a graph for retrieving the resource to return
+     * @return the provided resource
+     */
+    Resource get(ReadGraph graph);
+
+}