Serialization/Deserialization with Generics in Java
SerializationUtil should work on T extends Serializable instead of T. This makes misuse harder.
Prefixing serializable to a data-holder is unnecessary for almost all intents and purposes.
You may be interested in operating on Path instead of String when Serializing and deSerializing
Your Util does not provide a way to serialize multiple instances of the same class :/