add vault entry class

src/main/java/Vault.java

@@ -0,0 +1,2 @@
+public class Vault {
+}

src/test/java/VaultTest.java

@@ -0,0 +1,12 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.NoSuchElementException;
+
+public class VaultTest {
+
+}