--- a/frontends/src/bridge/bridge_frontend.py	Mon Jun 02 19:25:06 2014 +0200
+++ b/frontends/src/bridge/bridge_frontend.py	Sat Jun 07 15:20:39 2014 +0200
@@ -17,10 +17,32 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+
 class BridgeFrontend(object):
     def __init__(self):
         print "Bridge frontend initialization"
 
-
     def register(self, functionName, handler):
         raise NotImplementedError
+
+
+class BridgeException(Exception):
+    """An exception which has been raised from the backend and arrived to the frontend."""
+
+    def __init__(self, name, message):
+        """
+
+        @param name (str): full exception class name (with module)
+        @param message (str): error message
+        """
+        Exception.__init__(self)
+        self.fullname = unicode(name)
+        self.message = unicode(message)
+        self.module, dummy, self.classname = unicode(self.fullname).rpartition('.')
+
+    def __str__(self):
+        message = (': %s' % self.message) if self.message else ''
+        return self.classname + message
+
+    def __eq__(self, other):
+        return self.classname == other