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diff --git a/engine/src/core/com/jme3/asset/AssetEventListener.java b/engine/src/core/com/jme3/asset/AssetEventListener.java
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+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.asset;
+
+/**
+ * <code>AssetEventListener</code> is an interface for listening to various
+ * events happening inside {@link AssetManager}. For now, it is possible
+ * to receive an event when an asset has been requested
+ * (one of the AssetManager.load***() methods were called), or when
+ * an asset has been loaded.
+ * 
+ * @author Kirill Vainer
+ */
+public interface AssetEventListener {
+
+    /**
+     * Called when an asset has been successfully loaded (e.g: loaded from
+     * file system and parsed).
+     *
+     * @param key the AssetKey for the asset loaded.
+     */
+    public void assetLoaded(AssetKey key);
+
+    /**
+     * Called when an asset has been requested (e.g any of the load*** methods
+     * in AssetManager are called).
+     * In contrast to the assetLoaded() method, this one will be called even
+     * if the asset has failed to load, or if it was retrieved from the cache.
+     *
+     * @param key
+     */
+    public void assetRequested(AssetKey key);
+    
+    /**
+     * Called when an asset dependency cannot be found for an asset.
+     * When an asset is loaded, each of its dependent assets that 
+     * have failed to load due to a {@link AssetNotFoundException}, will cause 
+     * an invocation of this callback. 
+     * 
+     * @param parentKey The key of the parent asset that is being loaded
+     * from within the user application.
+     * @param dependentAssetKey The asset key of the dependent asset that has 
+     * failed to load.
+     */
+    public void assetDependencyNotFound(AssetKey parentKey, AssetKey dependentAssetKey);
+
+}