diff --git a/lib/cocoa/src/TException.m b/lib/cocoa/src/TException.m
new file mode 100644
index 0000000..7c84199
--- /dev/null
+++ b/lib/cocoa/src/TException.m
@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+#import "TException.h"
+
+@implementation TException
+
++ (id) exceptionWithName: (NSString *) name
+{
+  return [self exceptionWithName: name reason: @"unknown" error: nil];
+}
+
+
++ (id) exceptionWithName: (NSString *) name
+                  reason: (NSString *) reason
+{
+  return [self exceptionWithName: name reason: reason error: nil];
+}
+
+
++ (id) exceptionWithName: (NSString *) name
+                  reason: (NSString *) reason
+                   error: (NSError *) error
+{
+  NSDictionary * userInfo = nil;
+  if (error != nil) {
+    userInfo = [NSDictionary dictionaryWithObject: error forKey: @"error"];
+  }
+
+  return [super exceptionWithName: name
+                reason: reason
+                userInfo: userInfo];
+}
+
+
+- (NSString *) description
+{
+  NSMutableString * result = [NSMutableString stringWithString: [self name]];
+  [result appendFormat: @": %@", [self reason]];
+  if ([self userInfo] != nil) {
+    [result appendFormat: @"\n  userInfo = %@", [self userInfo]];
+  }
+
+  return result;
+}
+
+
+@end