fix: Better error reporting during validation.

Signed-off-by: Markus Sabadello <[email protected]>

src/main/java/com/danubetech/verifiablecredentials/validation/Validation.java

@@ -8,9 +8,9 @@
 
 public class Validation {
 
-    private static void validateTrue(boolean valid) throws IllegalStateException {
+    private static void validateTrue(boolean valid) {
 
-        if (! valid) throw new IllegalStateException();
+        if (! valid) throw new RuntimeException();
     }
 
     private static void validateUrl(URI uri) {
@@ -31,6 +31,7 @@ private static void validateRun(Runnable runnable, String message) throws Illega
             runnable.run();
         } catch (Exception ex) {
 
+            if (ex.getMessage() != null && ! ex.getMessage().isEmpty()) message = message + " (" + ex.getMessage().trim() + ")";
             throw new IllegalStateException(message);
         }
     }