chore: fixed Sonar issues

solidify-controller/src/main/java/ch/unige/solidify/config/SolidifyProperties.java

@@ -307,7 +307,7 @@ public class SolidifyProperties {
     public static class Cors {
       // #You can send more than one separated by space
       // http://my.domain.com https://my.domain.com http://my.otherdomain.com
-      private String allowedDomains;
+      private String allowedDomains = "";
 
       private String allowedMethods = "POST, GET, OPTIONS, DELETE, PUT, PATCH, HEAD";
 

solidify-controller/src/main/java/ch/unige/solidify/service/security/SolidifyDownloadTokenPermissionService.java

@@ -35,7 +35,7 @@ import ch.unige.solidify.model.security.SolidifyDownloadTokenType;
 import ch.unige.solidify.repository.DownloadTokenRepository;
 import ch.unige.solidify.util.HashTool;
 
-public abstract class SolidifyDownloadTokenPermissionService<T extends SolidifyDownloadTokenType> extends SolidifyPermissionService {
+public abstract class SolidifyDownloadTokenPermissionService<T extends SolidifyDownloadTokenType> implements SolidifyPermissionService {
 
   private final DownloadTokenRepository downloadTokenRepository;
 

solidify-controller/src/main/java/ch/unige/solidify/service/security/SolidifyPermissionService.java

@@ -25,9 +25,6 @@ package ch.unige.solidify.service.security;
 
 import ch.unige.solidify.auth.service.ApplicationRoleListService;
 
-public abstract class SolidifyPermissionService implements ApplicationRoleListService {
-
-  protected SolidifyPermissionService() {
-  }
+public interface SolidifyPermissionService extends ApplicationRoleListService {
 
 }