$ nano /opt/maven/hello-one/app/src/main/java/com/xyz/integration/Hello.java

package com.xyz.integration;

import com.xyz.commons.*;

public class Hello {

        String name = "World"; // default

        public Hello(){
        }

        public Hello(String name){
            this.name = name;
        }
        
        public String getName() {
            return name;
        }

        public String getGreetings() {
            return "Hello " + getName() + "!";
        } 

        public static void main(String[] args) {
            Hello hello = new Hello("World");
            String msg = hello.getGreetings() + " Today is " + DateUtil.getToday();
            System.out.println(msg);
        }

}

$ nano /opt/maven/hello-one/app/src/test/java/com/xyz/integration/HelloTest.java

package com.xyz.integration;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

public class HelloTest {

        @Test
        public void testGetName() {
                String actual = new Hello("World").getName();
                String expected = "World";
                assertEquals(expected, actual);
        }

        @Test
        public void testGetGreetings() {
                String actual = new Hello().getGreetings();
                String expected = new Hello("World").getGreetings();
                assertEquals(expected, actual);
        }
}

$ nano /opt/maven/hello-one/app/pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

        <modelVersion>4.0.0</modelVersion>

        <!-- parent coordinates -->
        <parent>
            <groupId>com.xyz</groupId>
            <artifactId>hello-one-pom</artifactId>
            <version>1.0</version>
        </parent>

        <!-- project coordinates -->
        <groupId>com.xyz</groupId>
        <artifactId>app-jar</artifactId>
        <version>1.0</version>

        <packaging>jar</packaging>

        <!-- project dependencies -->
        <dependencies>

            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>

            <dependency>
                <groupId>com.xyz</groupId>
                <artifactId>util-jar</artifactId>
                <version>1.0</version>
            </dependency>

        </dependencies>
</project>