diff --git a/libreplan-webapp/src/main/java/org/libreplan/importers/IImportRosterFromTim.java b/libreplan-webapp/src/main/java/org/libreplan/importers/IImportRosterFromTim.java
new file mode 100644
index 000000000..05349b835
--- /dev/null
+++ b/libreplan-webapp/src/main/java/org/libreplan/importers/IImportRosterFromTim.java
@@ -0,0 +1,39 @@
+/*
+ * This file is part of LibrePlan
+ *
+ * Copyright (C) 2013 St. Antoniusziekenhuis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * 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/>.
+ */
+
+package org.libreplan.importers;
+
+import org.libreplan.business.calendars.entities.CalendarException;
+
+/**
+ * Import Rosters from Tim SOAP server using {@link TimSoapClient} and updates
+ * worker's Exception calendar accordingly
+ *
+ * @author Miciele Ghiorghis <m.ghiorghis@antoniusziekenhuis.nl>
+ */
+public interface IImportRosterFromTim {
+
+    /**
+     * Import rosters from Tim and update workers' {@link CalendarException}
+     * <p>
+     * If worker's calendar exception already exists it will be removed and
+     * added new one, in other cases a new calendar exception will be created
+     */
+    void importRosters();
+}