diff --git a/lib/cocoa/TException.m b/lib/cocoa/TException.m
new file mode 100644
index 0000000..38d00ca
--- /dev/null
+++ b/lib/cocoa/TException.m
@@ -0,0 +1,33 @@
+#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];
+}
+
+
+@end