diff --git a/.github/.keep b/.github/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/TD04/.mvn/jvm.config b/TD04/.mvn/jvm.config
new file mode 100644
index 0000000..e69de29
diff --git a/TD04/.mvn/maven.config b/TD04/.mvn/maven.config
new file mode 100644
index 0000000..e69de29
diff --git a/TD04/pom.xml b/TD04/pom.xml
new file mode 100644
index 0000000..a74ef37
--- /dev/null
+++ b/TD04/pom.xml
@@ -0,0 +1,21 @@
+<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>
+  <groupId>fr.ivars</groupId>
+  <artifactId>TD04</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <properties>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target></properties>
+  <name>fr.ivars</name>
+  <url>http://maven.apache.org</url>
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
\ No newline at end of file
diff --git a/TD04/src/main/java/fr/ivars/App.java b/TD04/src/main/java/fr/ivars/App.java
new file mode 100644
index 0000000..b806b8b
--- /dev/null
+++ b/TD04/src/main/java/fr/ivars/App.java
@@ -0,0 +1,22 @@
+package fr.ivars;
+
+/**
+ * Hello world!
+ *
+ */
+public class App 
+{
+    public static void main( String[] args )
+    {
+        System.out.println(hello());
+    }
+
+    public static String hello() {
+        return  "Hello World!" ;
+    }
+
+    public static String hello(String param) {
+        return  param ;
+    }
+    
+}
diff --git a/TD04/src/test/java/fr/ivars/AppTest.java b/TD04/src/test/java/fr/ivars/AppTest.java
new file mode 100644
index 0000000..6fc37f9
--- /dev/null
+++ b/TD04/src/test/java/fr/ivars/AppTest.java
@@ -0,0 +1,45 @@
+package fr.ivars;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+    extends TestCase
+{
+    /**
+     * Create the test case
+     *
+     * @param testName name of the test case
+     */
+    public AppTest( String testName )
+    {
+        super( testName );
+    }
+
+    /**
+     * @return the suite of tests being tested
+     */
+    public static Test suite()
+    {
+        return new TestSuite( AppTest.class );
+    }
+
+    /**
+     * Test the return with empty parameter
+     */
+    public void testHelloEmptyParameter()
+    {
+        assertEquals("Hello World!", App.hello());
+    }
+
+    /**
+     * Test the return with a parameter
+     */
+    public void testHelloParameter()
+    {
+        assertEquals("Hello JMB!", App.hello("Hello JMB!"));
+    }
+}