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diff --git a/sw/inc/IInterface.hxx b/sw/inc/IInterface.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+ #ifndef IINTERFACE_HXX_INCLUDED
+ #define IINTERFACE_HXX_INCLUDED
+
+ #include <sal/types.h>
+
+ /** The base interface
+ */
+ class IInterface
+ {
+ public:
+
+    /** Aquire a reference to an instance. A caller shall release
+        the instance by calling 'release' when it is no longer needed.
+        'acquire' and 'release' calls need to be balanced.
+
+        @returns
+        the current reference count of the instance for debugging purposes.
+    */
+    virtual sal_Int32 acquire() = 0;
+
+    /** Releases a reference to an instance. A caller has to call
+        'release' when a before aquired reference to an instance
+        is no longer needed. 'acquire' and 'release' calls need to
+        be balanced.
+
+    @returns
+        the current reference count of the instance for debugging purposes.
+    */
+    virtual sal_Int32 release() = 0;
+
+    /** Returns the current reference count. This method should be used for
+        debugging purposes. Using it otherwise is a signal of a design flaw.
+    */
+    virtual sal_Int32 getReferenceCount() const = 0;
+
+protected:
+    virtual ~IInterface() {};
+ };
+
+ #endif // IDOCUMENT_HXX_INCLUDED
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */