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diff --git a/libjava/classpath/javax/imageio/spi/RegisterableService.java b/libjava/classpath/javax/imageio/spi/RegisterableService.java
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+/* RegisterableService.java -- An interface for service providers.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+
+/**
+ * An interface which service providers may optionally implement in
+ * order to get notified when they are added or removed from a {@link
+ * ServiceRegistry}.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public interface RegisterableService
+{
+  /**
+   * Informs this service provider that it has been registered in a
+   * {@link ServiceRegistry}. If this provider gets registered as an
+   * implementor for several service categories, its
+   * <code>onRegistration</code> method will be called multiple times.
+   *
+   * @param registry the registry to which this service provider has
+   * been added.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  void onRegistration(ServiceRegistry registry, Class category);
+
+
+  /**
+   * Informs this service provider that it has been de-registered from
+   * a {@link ServiceRegistry}. If this provider had been registered
+   * as an implementor for several service categories, its
+   * <code>onDeregistration</code> method will be called multiple
+   * times.
+   *
+   * @param registry the registry from which this service provider has
+   * been removed.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  void onDeregistration(ServiceRegistry registry, Class category);
+}
+