added main class

pom.xml

@@ -10,16 +10,19 @@
 	<name>travis-ci-tutorial-java</name>
 
 	<dependencies>
+
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
 			<version>4.12</version>
 			<scope>test</scope>
 		</dependency>
+
 	</dependencies>
 
 	<build>
 		<plugins>
+
 			<plugin>
 				<groupId>org.jacoco</groupId>
 				<artifactId>jacoco-maven-plugin</artifactId>
@@ -39,6 +42,33 @@
 					</execution>
 				</executions>
 			</plugin>
+
+			<plugin>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<version>2.6</version>
+				<configuration>
+					<descriptorRefs>
+						<descriptorRef>jar-with-dependencies</descriptorRef>
+					</descriptorRefs>
+					<finalName>travis-ci-tutorial</finalName>
+					<appendAssemblyId>false</appendAssemblyId>
+					<archive>
+						<manifest>
+							<mainClass>io.github.joaomlneto.travis_ci_tutorial_java.SimpleCalculator</mainClass>
+						</manifest>
+					</archive>
+				</configuration>
+				<executions>
+					<execution>
+						<id>build-jar-with-dependencies</id>
+						<phase>package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+
 		</plugins>
 	</build>
 </project>

src/main/java/io/github/joaomlneto/travis_ci_tutorial_java/SimpleCalculator.java

@@ -13,4 +13,7 @@ public int mul(int a, int b) {
 	public int div(int a, int b) {
 		return a / b;
 	}
+	public static final void main(String[] args) {
+		System.out.println("Hello world?");
+	}
 }