diff --git a/libreplan-business/src/main/java/org/libreplan/business/orders/imports/OrderImporter.java b/libreplan-business/src/main/java/org/libreplan/business/orders/imports/OrderImporter.java
new file mode 100644
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+++ b/libreplan-business/src/main/java/org/libreplan/business/orders/imports/OrderImporter.java
@@ -0,0 +1,65 @@
+/*
+ * This file is part of LibrePlan
+ *
+ * Copyright (C) 2012 Igalia, S.L.
+ *
+ * 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.business.orders.imports;
+
+import java.io.InputStream;
+
+import org.libreplan.business.orders.entities.Order;
+
+/**
+ * Contract for the {@link OrderImporterMPXJ}.
+ *
+ * Has all the methods needed to successfully import some external project files
+ * into Libreplan.
+ *
+ * @author Alba Carro Pérez <alba.carro@gmail.com>
+ */
+public interface OrderImporter {
+
+    /**
+     * Makes a {@link ImportData} from a InputStream.
+     *
+     * @param file
+     *            InputStream to extract data from.
+     * @param filename
+     *            String with the name of the original file of the InputStream.
+     * @return ImportData with the data that we want to import.
+     */
+    public ImportData getImportData(InputStream file, String filename);
+
+    /**
+     * Makes a {@link Order} from a {@link ImportData}.
+     *
+     * @param project
+     *            ImportData to extract data from.
+     * @return Order with all the data that we want.
+     */
+    public Order convertImportDataToOrder(ImportData project);
+
+    /**
+     * Saves a {@link Order} which has all the data that we want to store in the
+     * database.
+     *
+     * @param Order
+     *            Order with the data.
+     */
+    public void storeOrder(Order order);
+
+}