fix some warnings

src/test/java/mops/gruppen2/Gruppen2ApplicationTests.java

@@ -6,6 +6,7 @@ import org.springframework.boot.test.context.SpringBootTest;
 @SpringBootTest
 class Gruppen2ApplicationTests {
 
+    @SuppressWarnings("EmptyMethod")
     @Test
     void contextLoads() {
     }

src/test/java/mops/gruppen2/architecture/ControllerTest.java

@@ -11,7 +11,7 @@ import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.classes;
 import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses;
 
 @AnalyzeClasses(packages = "mops.gruppen2", importOptions = ImportOption.DoNotIncludeTests.class)
-public class ControllerTest {
+class ControllerTest {
 
     @ArchTest
     public static final ArchRule controllerClassesShouldBeAnnotatedWithControllerOrRestControllerAnnotation = classes()

src/test/java/mops/gruppen2/architecture/DomainTest.java

@@ -10,7 +10,7 @@ import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.classes;
 import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses;
 
 @AnalyzeClasses(packages = "mops.gruppen2", importOptions = ImportOption.DoNotIncludeTests.class)
-public class DomainTest {
+class DomainTest {
 
     @ArchTest
     public static final ArchRule domainClassesShouldNotAccessClassesFromOtherPackagesExceptDomainItself = noClasses()

src/test/java/mops/gruppen2/architecture/LayeredArchitectureTest.java

@@ -7,7 +7,7 @@ import com.tngtech.archunit.lang.ArchRule;
 import com.tngtech.archunit.library.Architectures;
 
 @AnalyzeClasses(packages = "mops.gruppen2", importOptions = ImportOption.DoNotIncludeTests.class)
-public class LayeredArchitectureTest {
+class LayeredArchitectureTest {
 
     private static final Architectures.LayeredArchitecture layeredArchitecture = Architectures
             .layeredArchitecture()

src/test/java/mops/gruppen2/architecture/RepositoryTest.java

@@ -10,7 +10,7 @@ import org.springframework.stereotype.Repository;
 import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.classes;
 
 @AnalyzeClasses(packages = "mops.gruppen2", importOptions = ImportOption.DoNotIncludeTests.class)
-public class RepositoryTest {
+class RepositoryTest {
 
     @ArchTest
     public static final ArchRule repositoryClassesThatAreAnnotatedWithRepositoryShouldHaveRepositoryInName = classes()

src/test/java/mops/gruppen2/architecture/ServiceTest.java

@@ -9,7 +9,7 @@ import org.springframework.stereotype.Service;
 import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.classes;
 
 @AnalyzeClasses(packages = "mops.gruppen2", importOptions = ImportOption.DoNotIncludeTests.class)
-public class ServiceTest {
+class ServiceTest {
 
     @ArchTest
     public static final ArchRule serviceClassesShouldHaveServiceInName = classes()

src/test/java/mops/gruppen2/controller/APIControllerTest.java

@@ -42,6 +42,7 @@ class APIControllerTest {
     @Autowired
     private JdbcTemplate template;
 
+    @SuppressWarnings("SyntaxError")
     @BeforeEach
     void setUp() {
         eventRepository.deleteAll();

src/test/java/mops/gruppen2/service/EventStoreServiceTest.java

@@ -35,6 +35,7 @@ class EventStoreServiceTest {
     @Autowired
     private JdbcTemplate template;
 
+    @SuppressWarnings("SyntaxError")
     @BeforeEach
     void setUp() {
         eventStoreService = new EventStoreService(eventRepository);

src/test/java/mops/gruppen2/service/GroupServiceTest.java

@@ -57,6 +57,7 @@ class GroupServiceTest {
     @Autowired
     private InviteService inviteService;
 
+    @SuppressWarnings("SyntaxError")
     @BeforeEach
     void setUp() {
         groupService = new GroupService(eventStoreService, inviteService);