Pack original exception into runtime exception

Author: armin-reichert

pacman-ui/src/main/java/de/amr/pacmanfx/ui/GameUI_Builder.java

@@ -156,11 +156,11 @@ private StartPage createStartPage(GameUI ui, String gameVariant, Class<?> startP
                 var constructor = startPageClass.getDeclaredConstructor(GameUI.class);
                 return (StartPage) constructor.newInstance(ui);
             } catch (Exception xx) {
-                error("Could not create start page from class '%s'".formatted(startPageClass.getSimpleName()));
+                error("Could not create start page from class '%s'".formatted(startPageClass.getSimpleName()), xx);
                 throw new IllegalStateException(xx);
             }
         } catch (Exception x) {
-            error("Could not create start page from class '%s'".formatted(startPageClass.getSimpleName()));
+            error("Could not create start page from class '%s'".formatted(startPageClass.getSimpleName()), x);
             throw new IllegalStateException(x);
         }
     }
@@ -175,7 +175,7 @@ private Game createGameModel(Class<?> modelClass, MapSelector mapSelector, GameC
                 ? modelClass.getDeclaredConstructor(GameContext.class, MapSelector.class, File.class).newInstance(gameContext, mapSelector, highScoreFile)
                 : modelClass.getDeclaredConstructor(GameContext.class, File.class).newInstance(gameContext, highScoreFile));
         } catch (Exception x) {
-            error("Could not create game model from class %s".formatted(modelClass.getSimpleName()));
+            error("Could not create game model from class %s".formatted(modelClass.getSimpleName()), x);
             throw new RuntimeException(x);
         }
     }
@@ -204,6 +204,10 @@ private void validateGameVariantKey(String key) {
         }
     }
 
+    private void error(String message, Throwable x) {
+        throw new RuntimeException("UI building failed: %s".formatted(message), x);
+    }
+
     private void error(String message) {
         throw new RuntimeException("UI building failed: %s".formatted(message));
     }