diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/adapters/IDisabilityConfiguration.java b/ganttzk/src/main/java/org/zkoss/ganttz/adapters/IDisabilityConfiguration.java
new file mode 100644
index 000000000..e54a4e167
--- /dev/null
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/adapters/IDisabilityConfiguration.java
@@ -0,0 +1,30 @@
+/*
+ * This file is part of ###PROJECT_NAME###
+ *
+ * Copyright (C) 2009 Fundación para o Fomento da Calidade Industrial e
+ *                    Desenvolvemento Tecnolóxico de Galicia
+ *
+ * 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.zkoss.ganttz.adapters;
+
+/**
+ * @author Óscar González Fernández <ogonzalez@igalia.com>
+ *
+ */
+public interface IDisabilityConfiguration {
+
+    public boolean isAddingDependenciesEnabled();
+
+}
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/adapters/PlannerConfiguration.java b/ganttzk/src/main/java/org/zkoss/ganttz/adapters/PlannerConfiguration.java
index b310badee..28a48da6a 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/adapters/PlannerConfiguration.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/adapters/PlannerConfiguration.java
@@ -35,7 +35,7 @@ import org.zkoss.zk.ui.Component;
  * A object that defines several extension points for gantt planner
  * @author Óscar González Fernández <ogonzalez@igalia.com>
  */
-public class PlannerConfiguration<T> {
+public class PlannerConfiguration<T> implements IDisabilityConfiguration {
 
     private static class NullCommand<T> implements ICommand<T> {
 
@@ -161,6 +161,7 @@ public class PlannerConfiguration<T> {
         this.addingDependenciesEnabled = addingDependenciesEnabled;
     }
 
+    @Override
     public boolean isAddingDependenciesEnabled() {
         return addingDependenciesEnabled;
     }