Add missing Class

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19044 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/patches/DateTimePatch.py

@@ -32,6 +32,18 @@ from DateTime.DateTime import _calcSD, _calcDependentSecond, _calcYMDHMS, getDef
 
 STATE_KEY = 'str'
 
+class DateTimeError( Exception ):
+    pass
+
+class SyntaxError( DateTimeError ):
+    pass
+
+class DateError( DateTimeError ):
+    pass
+
+class TimeError( DateTimeError ):
+    pass
+
 def DateTime__setstate__(self, state):
   if isinstance(state, tuple):
     t, tz = state