| Exception | Base implementation for Fever Exception API |
| IllegalAccessException | Thrown to indicate that a method marked by the developer as protected is called by not permitted instance |
| IllegalArgumentException | Thrown to indicate that a method has been passed an illegal or inappropriate argument |
| JavaScriptException | Thrown to indicate that a client-side JavaScript method has thrown an error |
| MementoException | Thrown when a memento error occured |
| NullPointerException |
Thrown to indicate that a method has been passed a "null" or
undefined argument |
| RuntimeException | Thrown to indicate an error during runtime/interactive process |
| ValidationException | Thrown to indicate an error in validation process. |