Use xml / javaconfig folders for samples

Fixes gh-3752

samples/xml/contacts/src/main/java/sample/contact/ContactDao.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample.contact;
+
+import java.util.List;
+
+/**
+ * Provides access to the application's persistence layer.
+ *
+ * @author Ben Alex
+ */
+public interface ContactDao {
+	// ~ Methods
+	// ========================================================================================================
+
+	public void create(Contact contact);
+
+	public void delete(Long contactId);
+
+	public List<Contact> findAll();
+
+	public List<String> findAllPrincipals();
+
+	public List<String> findAllRoles();
+
+	public Contact getById(Long id);
+
+	public void update(Contact contact);
+}