Changed package naming across all examples.

service-layer/src/main/java/com/iluwatar/servicelayer/common/Dao.java

@@ -0,0 +1,23 @@
+package com.iluwatar.servicelayer.common;
+
+import java.util.List;
+
+/**
+ * 
+ * Dao interface.
+ *
+ * @param <E>
+ * 
+ */
+public interface Dao<E extends BaseEntity> {
+
+	E find(Long id);
+	
+	void persist(E entity);
+	
+	E merge(E entity);
+	
+	void delete(E entity);
+	
+	List<E> findAll();
+}