--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/core/HgLibraryFailureException.java	Thu Mar 29 17:14:35 2012 +0200
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2012 TMate Software Ltd
+ *  
+ * This program 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; version 2 of the License.
+ *
+ * This program 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.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.core;
+
+import org.tmatesoft.hg.repo.HgRuntimeException;
+
+/**
+ * Sole purpose of this exception is to wrap unexpected errors from the library implementation and 
+ * propagate them to clients of hi-level API for graceful (and explicit) processing.
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+@SuppressWarnings("serial")
+public class HgLibraryFailureException extends HgException {
+
+	public HgLibraryFailureException(HgRuntimeException cause) {
+		super(cause);
+		assert cause != null;
+	}
+	
+	@Override
+	public HgRuntimeException getCause() {
+		return (HgRuntimeException) super.getCause();
+	}
+}