diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/model/ValidationException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/model/ValidationException.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,70 @@
+/**
+ * Copyright (c) 2012, Ben Fortuna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  o Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ *  o 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.
+ *
+ *  o Neither the name of Ben Fortuna nor the names of any other 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 net.fortuna.ical4j.model;
+
+import java.text.MessageFormat;
+
+/**
+ * $Id$ [23-Apr-2004]
+ *
+ * An exception thrown during validation.
+ * 
+ * @author Ben Fortuna
+ */
+public class ValidationException extends Exception {
+    
+    private static final long serialVersionUID = 309245291364742896L;
+
+    /**
+     * Default constructor.
+     */
+    public ValidationException() {
+        super();
+    }
+
+    /**
+     * Constructor with message.
+     * @param message a message
+     */
+    public ValidationException(final String message) {
+        super(message);
+    }
+
+    /**
+     * Constructor with message pattern and arguments.
+     * @param message a message pattern
+     * @param args message arguments
+     */
+    public ValidationException(final String message, Object[] args) {
+        super(MessageFormat.format(message, args));
+    }
+}