remove not null constraint

dmnverifierapi/src/main/java/de/unikoblenz/fgbks/core/dmn/verification/verifier/types/DateVerification.java

@@ -2,22 +2,21 @@ package de.unikoblenz.fgbks.core.dmn.verification.verifier.types;
 
 import de.unikoblenz.fgbks.base.domain.Description;
 import de.unikoblenz.fgbks.base.domain.Name;
-import javax.validation.constraints.NotNull;
 
 public class DateVerification extends AbstractVerificationType {
 
   @Override
-  public @NotNull VerificationTypeClassification getClassification() {
+  public VerificationTypeClassification getClassification() {
     return VerificationTypeClassification.SYNTAX_LEVEL_VERIFICATION;
   }
 
   @Override
-  public @NotNull Name getName() {
+  public Name getName() {
     return new Name("Date format check");
   }
 
   @Override
-  public @NotNull Description getDescription() {
+  public Description getDescription() {
     return new Description("Test");
   }
 }

dmnverifierapi/src/main/java/de/unikoblenz/fgbks/core/dmn/verification/verifier/types/EmptyOutputVerification.java

@@ -2,22 +2,21 @@ package de.unikoblenz.fgbks.core.dmn.verification.verifier.types;
 
 import de.unikoblenz.fgbks.base.domain.Description;
 import de.unikoblenz.fgbks.base.domain.Name;
-import javax.validation.constraints.NotNull;
 
 public class EmptyOutputVerification extends AbstractVerificationType {
 
   @Override
-  public @NotNull VerificationTypeClassification getClassification() {
+  public VerificationTypeClassification getClassification() {
     return VerificationTypeClassification.SYNTAX_LEVEL_VERIFICATION;
   }
 
   @Override
-  public @NotNull Name getName() {
+  public Name getName() {
     return new Name("Empty output check");
   }
 
   @Override
-  public @NotNull Description getDescription() {
+  public Description getDescription() {
     return new Description("Test");
   }
 }