#107 Dao example JavaDoc

dao/src/main/java/com/iluwatar/dao/App.java

@@ -7,9 +7,14 @@ import java.util.List;
  * 
  * With the DAO pattern, we can use various method calls to retrieve/add/delete/update data without directly
  * interacting with the data. The below example demonstrates basic operations(CRUD): select, add, update, and delete.
+ * 
  */
 public class App {
 
+	/**
+	 * Program entry point
+	 * @param args command line args
+	 */
 	public static void main(String[] args) {
 
 		CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
@@ -33,6 +38,10 @@ public class App {
 		System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
 	}
 
+	/**
+	 * Generate customers
+	 * @return list of customers
+	 */
 	public static List<Customer> generateSampleCustomers() {
 		Customer customer1 = new Customer(1, "Adam", "Adamson");
 		Customer customer2 = new Customer(2, "Bob", "Bobson");

dao/src/main/java/com/iluwatar/dao/Customer.java

@@ -1,6 +1,12 @@
 package com.iluwatar.dao;
 
+/**
+ * 
+ * Customer
+ *
+ */
 public class Customer {
+	
     private int id;
     private String firstName;
     private String lastName;

dao/src/main/java/com/iluwatar/dao/CustomerDao.java

@@ -2,7 +2,13 @@ package com.iluwatar.dao;
 
 import java.util.List;
 
+/**
+ * 
+ * CustomerDao
+ *
+ */
 public interface CustomerDao {
+	
     public List<Customer> getAllCustomers();
     public Customer getCusterById(int id);
     public void addCustomer(Customer customer);

dao/src/main/java/com/iluwatar/dao/CustomerDaoImpl.java

@@ -3,11 +3,13 @@ package com.iluwatar.dao;
 import java.util.List;
 
 /**
+ * 
  * The data access object (DAO) is an object that provides an abstract interface to some type of database or other persistence mechanism.
  * By mapping application calls to the persistence layer, DAO provide some specific data operations without exposing details of the database.
  * This isolation supports the Single responsibility principle. It separates what data accesses the application needs, in terms of
  * domain-specific objects and data types (the public interface of the DAO), from how these needs can be satisfied with a specific DBMS,
  * database schema, etc.
+ * 
  */
 public class CustomerDaoImpl implements CustomerDao {
 

dao/src/test/java/com/iluwatar/dao/AppTest.java

@@ -4,6 +4,11 @@ import org.junit.Test;
 
 import com.iluwatar.dao.App;
 
+/**
+ * 
+ * Application test
+ *
+ */
 public class AppTest {
 
 	@Test