diff --git a/src/main/java/PasswordManager.java b/src/main/java/PasswordManager.java
new file mode 100644
index 0000000..829ecec
--- /dev/null
+++ b/src/main/java/PasswordManager.java
@@ -0,0 +1,19 @@
+public class PasswordManager implements PasswordManagerInterface {
+    public static void main(String[] args) {
+        new PasswordManager();
+    }
+
+    public PasswordManager() {
+        System.out.println("Hello World");
+    }
+
+    @Override
+    public void listVaults() {
+
+    }
+
+    @Override
+    public void openVault() {
+
+    }
+}
diff --git a/src/main/java/PasswordManagerInterface.java b/src/main/java/PasswordManagerInterface.java
new file mode 100644
index 0000000..fdfffad
--- /dev/null
+++ b/src/main/java/PasswordManagerInterface.java
@@ -0,0 +1,6 @@
+public interface PasswordManagerInterface {
+    public static void main(String[] args) {
+    };
+    public void listVaults();
+    public void openVault();
+}
diff --git a/src/test/java/PasswordManagerTest.java b/src/test/java/PasswordManagerTest.java
new file mode 100644
index 0000000..cdde10f
--- /dev/null
+++ b/src/test/java/PasswordManagerTest.java
@@ -0,0 +1,30 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+
+class PasswordManagerTest {
+
+    static PasswordManager pm;
+
+    @BeforeAll
+    static void init() {
+        pm = new PasswordManager();
+    }
+
+    @Test
+    void constructor() {
+        assertInstanceOf(PasswordManager.class, pm);
+    }
+
+    @Test
+    void listVaults() {
+        pm.listVaults();
+    }
+
+    @Test
+    void openVault() {
+        pm.openVault();
+    }
+}