#36 Make class final if no other class inherits from it

Signed-off-by: Sven Strittmatter <sven.strittmatter@iteratec.com>

Author: Weltraumschaf

src/main/java/io/securecodebox/persistence/defectdojo/exception/LoopException.java

@@ -4,7 +4,7 @@
 
 package io.securecodebox.persistence.defectdojo.exception;
 
-public class LoopException extends RuntimeException {
+public final class LoopException extends RuntimeException {
   public LoopException(String message) {
     super(message);
   }

src/main/java/io/securecodebox/persistence/defectdojo/exception/PersistenceException.java

@@ -4,7 +4,7 @@
 
 package io.securecodebox.persistence.defectdojo.exception;
 
-public class PersistenceException extends RuntimeException {
+public final class PersistenceException extends RuntimeException {
     public PersistenceException(String message) {
         super(message);
     }