diff --git a/qubesmanager/thread_monitor.py b/qubesmanager/thread_monitor.py
new file mode 100644
index 0000000..8515aff
--- /dev/null
+++ b/qubesmanager/thread_monitor.py
@@ -0,0 +1,42 @@
+#!/usr/bin/python2
+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2011  Marek Marczykowski <marmarek@mimuw.edu.pl>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with this program; if not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+
+import PyQt4.QtCore  # pylint: disable=import-error
+
+import threading
+
+class ThreadMonitor(PyQt4.QtCore.QObject):
+    def __init__(self):
+        self.success = True
+        self.error_msg = None
+        self.event_finished = threading.Event()
+
+    def set_error_msg(self, error_msg):
+        self.success = False
+        self.error_msg = error_msg
+        self.set_finished()
+
+    def is_finished(self):
+        return self.event_finished.is_set()
+
+    def set_finished(self):
+        self.event_finished.set()