Exemplo da aula 3 vem com problemas nas viewes e não reconhece os beans

Baixei o exemplo da aula 3 do curso de jsf 1, porem ele não reconhece os beans. o atributo fica grifado de amarelo no xhtml, e com esse warning:

Method must have signature "String method(), String method(), String method(String), String method(String, String), String method(String, String, String), String 
 method(String, String, String, String), String method(String, String, String, String, String), String method(String, String, String, String, String, String), String method(String, 
 String, String, String, String, String, String), String method(String, String, String, String, String, String, String, String), String method(String, String, String, String, String, String, 
 String, String, String), String method(String, String, String, String, String, String, String, String, String, String), String method(String, String, String, String, String, String, String, 
 String, String, String, String), String method(String, String, String, String, String, String, String, String, String, String, String, String), String method(String, String, String, String, 
 String, String, String, String, String, String, String, String, String), String method(String, String, String, String, String, String, String, String, String, String, String, String, String, 
 String), String method(String, String, String, String, String, String, String, String, String, String, String, String, String, String, String), String method(String, String, String, String, 
 String, String, String, String, String, String, String, String, String, String, String, String), String method(String, String, String, String, String, String, String, String, String, String, 
 String, String, String, String, String, String, String), String method(String, String, String, String, String, String, String, String, String, String, String, String, String, String, String, 
 String, String, String), String method(String, String, String, String, String, String, String, String, String, String, String, String, String, String, String, String, String, String, String)" 
 but has signature "void method()"