catch all exceptions so that we have logs

mobile.webservice.php

@@ -58,6 +58,9 @@ abstract class WebService
             $data["error"]["name"] = $e->getName();
             $data["error"]["reason"] = $e->getMessage();
             $this->log(sprintf("Failure : [%s] %s", $e->getCode(), $e->getName()));
+        } catch (Exception $e) {
+            $data["unexpected error"]["message"] = $e->getMessage();
+            $this->log(sprintf("Unexpected exception : %s", $e->getMessage()));
         }
 
         $this->Send($data);