diff --git a/src/main/java/de/ozgcloud/admin/common/errorhandling/DynamicViolationParameter.java b/src/main/java/de/ozgcloud/admin/common/errorhandling/DynamicViolationParameter.java
index 89f8e0ee9c80f9428237dfe2f71c12e4768e93e4..7efd10a1a615dfe4715ebaf608ee6655068b1673 100644
--- a/src/main/java/de/ozgcloud/admin/common/errorhandling/DynamicViolationParameter.java
+++ b/src/main/java/de/ozgcloud/admin/common/errorhandling/DynamicViolationParameter.java
@@ -1,26 +1,3 @@
-/*
- * Copyright (C) 2022 Das Land Schleswig-Holstein vertreten durch den
- * Ministerpräsidenten des Landes Schleswig-Holstein
- * Staatskanzlei
- * Abteilung Digitalisierung und zentrales IT-Management der Landesregierung
- *
- * Lizenziert unter der EUPL, Version 1.2 oder - sobald
- * diese von der Europäischen Kommission genehmigt wurden -
- * Folgeversionen der EUPL ("Lizenz");
- * Sie dürfen dieses Werk ausschließlich gemäß
- * dieser Lizenz nutzen.
- * Eine Kopie der Lizenz finden Sie hier:
- *
- * https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12
- *
- * Sofern nicht durch anwendbare Rechtsvorschriften
- * gefordert oder in schriftlicher Form vereinbart, wird
- * die unter der Lizenz verbreitete Software "so wie sie
- * ist", OHNE JEGLICHE GEWÄHRLEISTUNG ODER BEDINGUNGEN -
- * ausdrücklich oder stillschweigend - verbreitet.
- * Die sprachspezifischen Genehmigungen und Beschränkungen
- * unter der Lizenz sind dem Lizenztext zu entnehmen.
- */
 package de.ozgcloud.admin.common.errorhandling;
 
 import java.util.HashMap;
diff --git a/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionTestFactory.java b/src/test/java/de/ozgcloud/admin/common/errorhandling/ConstraintViolationTestFactory.java
similarity index 96%
rename from src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionTestFactory.java
rename to src/test/java/de/ozgcloud/admin/common/errorhandling/ConstraintViolationTestFactory.java
index 7a4b0747605bdd5af1fa865b0037391afd0d5211..660e3e74e2ead731e6693d043a084360ea50495c 100644
--- a/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionTestFactory.java
+++ b/src/test/java/de/ozgcloud/admin/common/errorhandling/ConstraintViolationTestFactory.java
@@ -37,7 +37,7 @@ import org.hibernate.validator.engine.HibernateConstraintViolation;
 
 import com.thedeanda.lorem.LoremIpsum;
 
-public class ExceptionTestFactory {
+public class ConstraintViolationTestFactory {
 
 	static final String EXCEPTION_ID = UUID.randomUUID().toString();
 
@@ -51,7 +51,7 @@ public class ExceptionTestFactory {
 	public static final String PATH = PATH_PREFIX + "." + PATH_FIELD;
 
 	public static ConstraintViolation<?> buildMockedConstraintViolation() {
-		return ExceptionTestFactory.buildMockedConstraintViolationWithDynamicPayload(null);
+		return buildMockedConstraintViolationWithDynamicPayload(null);
 	}
 
 	@SuppressWarnings({ "unchecked" })
diff --git a/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionControllerTest.java b/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionControllerTest.java
index 0d928338086d85e7dbbf687d71c04a953d17ed55..d263ff1a5c34b344e8528f768a019f29d27e0a9e 100644
--- a/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionControllerTest.java
+++ b/src/test/java/de/ozgcloud/admin/common/errorhandling/ExceptionControllerTest.java
@@ -423,37 +423,33 @@ class ExceptionControllerTest {
 	}
 
 	@Nested
-	class TestContraintValidationException {
+	class TestHandleConstraintViolationException {
+		private final String exceptionMessage = LoremIpsum.getInstance().getWords(5);
 
-		@Nested
-		class TestHandleConstraintViolationException {
-			private final String exceptionMessage = LoremIpsum.getInstance().getWords(5);
-
-			private final ConstraintViolationException exception = new ConstraintViolationException(exceptionMessage,
-					Collections.singleton(ExceptionTestFactory.buildMockedConstraintViolation()));
-
-			@Test
-			void shouldBuildConstraintViolationProblemDetail() {
-				handleException();
+		private final ConstraintViolationException exception = new ConstraintViolationException(exceptionMessage,
+				Collections.singleton(ConstraintViolationTestFactory.buildMockedConstraintViolation()));
 
-				verify(problemDetailMapper).fromConstraintViolationException(exception);
-			}
+		@Test
+		void shouldBuildConstraintViolationProblemDetail() {
+			handleException();
 
-			@Test
-			void shouldReturnBuiltProblemDetail() {
-				var expectedProblemDetail = ProblemDetail.forStatusAndDetail(HttpStatus.UNPROCESSABLE_ENTITY, exceptionMessage);
-				when(problemDetailMapper.fromConstraintViolationException(exception)).thenReturn(expectedProblemDetail);
+			verify(problemDetailMapper).fromConstraintViolationException(exception);
+		}
 
-				var problemDetail = handleException();
+		@Test
+		void shouldReturnBuiltProblemDetail() {
+			var expectedProblemDetail = ProblemDetail.forStatusAndDetail(HttpStatus.UNPROCESSABLE_ENTITY,
+					exceptionMessage);
+			when(problemDetailMapper.fromConstraintViolationException(exception)).thenReturn(expectedProblemDetail);
 
-				assertThat(problemDetail).isEqualTo(expectedProblemDetail);
-			}
+			var problemDetail = handleException();
 
-			private ProblemDetail handleException() {
-				return exceptionController.handleConstraintViolationException(exception);
-			}
+			assertThat(problemDetail).isEqualTo(expectedProblemDetail);
 		}
 
+		private ProblemDetail handleException() {
+			return exceptionController.handleConstraintViolationException(exception);
+		}
 	}
 
 	@SneakyThrows
diff --git a/src/test/java/de/ozgcloud/admin/common/errorhandling/IssueParamTestFactory.java b/src/test/java/de/ozgcloud/admin/common/errorhandling/IssueParamTestFactory.java
index 405befc2909899e53040793aa3cfd5a739e7bdf8..42a063990bb25f5c993f087179e7e00294d486fd 100644
--- a/src/test/java/de/ozgcloud/admin/common/errorhandling/IssueParamTestFactory.java
+++ b/src/test/java/de/ozgcloud/admin/common/errorhandling/IssueParamTestFactory.java
@@ -3,8 +3,8 @@ package de.ozgcloud.admin.common.errorhandling;
 import de.ozgcloud.admin.common.errorhandling.IssueParam.IssueParamBuilder;
 
 public class IssueParamTestFactory {
-	public static final String PARAM_NAME = ExceptionTestFactory.PARAM_NAME;
-	public static final String PARAM_DYNAMIC_VALUE = ExceptionTestFactory.PARAM_DYNAMIC_VALUE;
+	public static final String PARAM_NAME = ConstraintViolationTestFactory.PARAM_NAME;
+	public static final String PARAM_DYNAMIC_VALUE = ConstraintViolationTestFactory.PARAM_DYNAMIC_VALUE;
 
 	public static IssueParam create() {
 		return createBuilder()
diff --git a/src/test/java/de/ozgcloud/admin/common/errorhandling/ProblemDetailMapperTest.java b/src/test/java/de/ozgcloud/admin/common/errorhandling/ProblemDetailMapperTest.java
index 651b583b6fd8831e6a94db2f23a286d0849f57cf..da2d73946bcafb2bcf1223096ac3208cf5a927ce 100644
--- a/src/test/java/de/ozgcloud/admin/common/errorhandling/ProblemDetailMapperTest.java
+++ b/src/test/java/de/ozgcloud/admin/common/errorhandling/ProblemDetailMapperTest.java
@@ -37,7 +37,7 @@ class ProblemDetailMapperTest {
 	@Nested
 	class TestFromConstraintViolationException {
 		private final String exceptionMessage = LoremIpsum.getInstance().getWords(5);
-		private final Set<ConstraintViolation<?>> violations = Collections.singleton(ExceptionTestFactory.buildMockedConstraintViolation());
+		private final Set<ConstraintViolation<?>> violations = Collections.singleton(ConstraintViolationTestFactory.buildMockedConstraintViolation());
 		private final ConstraintViolationException exception = new ConstraintViolationException(exceptionMessage, violations);
 		private final String message = LoremIpsum.getInstance().getWords(5);
 
@@ -126,8 +126,8 @@ class ProblemDetailMapperTest {
 
 		@Nested
 		class OnViolations {
-			private final Set<ConstraintViolation<?>> violations = Set.of(ExceptionTestFactory.buildMockedConstraintViolation(),
-					ExceptionTestFactory.buildMockedConstraintViolation());
+			private final Set<ConstraintViolation<?>> violations = Set.of(ConstraintViolationTestFactory.buildMockedConstraintViolation(),
+					ConstraintViolationTestFactory.buildMockedConstraintViolation());
 
 			@Test
 			void shouldCallBuildDetailedViolation() {
@@ -177,11 +177,11 @@ class ProblemDetailMapperTest {
 
 	@Nested
 	class TestBuildDetailedViolation {
-		private final ConstraintViolation<?> violation = ExceptionTestFactory.buildMockedConstraintViolation();
+		private final ConstraintViolation<?> violation = ConstraintViolationTestFactory.buildMockedConstraintViolation();
 
 		@Test
 		void shouldContainFieldName() {
-			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_NAME, ExceptionTestFactory.PATH);
+			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_NAME, ConstraintViolationTestFactory.PATH);
 
 			var detailedViolation = callMapper();
 
@@ -190,7 +190,7 @@ class ProblemDetailMapperTest {
 
 		@Test
 		void shouldContainValue() {
-			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_VALUE, ExceptionTestFactory.PARAM_VALUE);
+			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_VALUE, ConstraintViolationTestFactory.PARAM_VALUE);
 
 			var detailedViolation = callMapper();
 
@@ -210,7 +210,7 @@ class ProblemDetailMapperTest {
 
 		@Test
 		void shouldContainReason() {
-			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_REASON, ExceptionTestFactory.MESSAGE);
+			var expectedEntry = new SimpleEntry<>(ProblemDetailMapper.INVALID_PARAMS_KEY_REASON, ConstraintViolationTestFactory.MESSAGE);
 
 			var detailedViolation = callMapper();
 
@@ -261,7 +261,7 @@ class ProblemDetailMapperTest {
 			when(violation.getConstraintDescriptor()).thenReturn(constraintDescriptor);
 			when(violation.unwrap(HibernateConstraintViolation.class)).thenReturn(hibernateConstraintViolation);
 			when(constraintDescriptor.getAttributes())
-					.thenReturn(Map.of(ExceptionTestFactory.PARAM_NAME, ExceptionTestFactory.PARAM_DYNAMIC_VALUE));
+					.thenReturn(Map.of(ConstraintViolationTestFactory.PARAM_NAME, ConstraintViolationTestFactory.PARAM_DYNAMIC_VALUE));
 		}
 
 		@Nested
@@ -284,7 +284,7 @@ class ProblemDetailMapperTest {
 			void shouldHaveReplacedIssueParameterName() {
 				var dynamicValue = LoremIpsum.getInstance().getWords(1);
 				var dynamicViolationParameter = DynamicViolationParameter.builder()
-						.map(Map.of(ExceptionTestFactory.PARAM_NAME, dynamicValue))
+						.map(Map.of(ConstraintViolationTestFactory.PARAM_NAME, dynamicValue))
 						.build();
 				when(hibernateConstraintViolation.getDynamicPayload(DynamicViolationParameter.class)).thenReturn(dynamicViolationParameter);
 				var expectedIssueParam = IssueParamTestFactory.createBuilder().value(dynamicValue).build();