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diff --git a/srcjar/org/apache/log4j/pattern/LoggingEventPatternConverter.java b/srcjar/org/apache/log4j/pattern/LoggingEventPatternConverter.java
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+++ b/srcjar/org/apache/log4j/pattern/LoggingEventPatternConverter.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.log4j.pattern;
+
+import org.apache.log4j.spi.LoggingEvent;
+
+
+/**
+ * LoggingEventPatternConverter is a base class for pattern converters
+ * that can format information from instances of LoggingEvent.
+ *
+ * @author Curt Arnold
+ *
+ */
+public abstract class LoggingEventPatternConverter extends PatternConverter {
+  /**
+   * Constructs an instance of LoggingEventPatternConverter.
+   * @param name name of converter.
+   * @param style CSS style for output.
+   */
+  protected LoggingEventPatternConverter(
+    final String name, final String style) {
+    super(name, style);
+  }
+
+  /**
+   * Formats an event into a string buffer.
+   * @param event event to format, may not be null.
+   * @param toAppendTo string buffer to which the formatted event will be appended.  May not be null.
+   */
+  public abstract void format(
+    final LoggingEvent event, final StringBuffer toAppendTo);
+
+  /**
+   * {@inheritDoc}
+   */
+  public void format(final Object obj, final StringBuffer output) {
+    if (obj instanceof LoggingEvent) {
+      format((LoggingEvent) obj, output);
+    }
+  }
+
+  /**
+   * Normally pattern converters are not meant to handle Exceptions although
+   * few pattern converters might.
+   *
+   * By examining the return values for this method, the containing layout will
+   * determine whether it handles throwables or not.
+
+   * @return true if this PatternConverter handles throwables
+   */
+  public boolean handlesThrowable() {
+    return false;
+  }
+}