small updates

Author: AnuRam123

src/main/java/org/openrewrite/java/migrate/ChangeDefaultKeyStore.java

@@ -50,6 +50,7 @@ public String getDescription() {
     public TreeVisitor<?, ExecutionContext> getVisitor() {
         return Preconditions.check(new UsesJavaVersion<>(11),
                 new JavaVisitor<ExecutionContext>() {
+                    @Override
                     public J visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
                         if (KEYSTORE_METHOD_REF.matches(method)) {
                             return new J.Literal(randomId(), Space.EMPTY, Markers.EMPTY, "\"jks\"", "\"jks\"", null, JavaType.Primitive.String);

src/test/java/org/openrewrite/java/migrate/ChangeDefaultKeyStoreTest.java

@@ -23,7 +23,7 @@
 import static org.openrewrite.java.Assertions.java;
 import static org.openrewrite.java.Assertions.javaVersion;
 
-public class ChangeDefaultKeyStoreTest implements RewriteTest {
+class ChangeDefaultKeyStoreTest implements RewriteTest {
     @Override
     public void defaults(RecipeSpec spec) {
         spec.recipe(new ChangeDefaultKeyStore())