Revize 8ca61504

Added missing comments, code refactoring

re #9743

backend/src/main/java/cz/zcu/kiv/backendapi/validation/EmailValidator.java

@@ -12 +12 @@
     /**
      * Email string pattern
      */
-    private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-+]+(.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(.[A-Za-z0-9]+)*(.[A-Za-z]{2,})$";
+    private static final String EMAIL_PATTERN = "^[_A-Za-z\\d-+]+(.[_A-Za-z\\d-]+)*@[A-Za-z\\d-]+(.[A-Za-z\\d]+)*(.[A-Za-z]{2,})$";
 
     /**
      * Email patter