name.cls

public class OhGodBees extends Exception{}
//fails: OhGodBees: Classes extending Exception must have a name ending in 'Exception'

noargs.cls

public class BeesException extends Exception{
    public BeesException(){}
}
//fails: System exception constructor already defined: <Constructor>()

nooverride.cls

public class BeesException extends Exception{
    public BeesException(String message, Boolean noop){
        this.setMessage(message);
    }
    public void setMessage(String message){
        super.setMessage(message);
    }
}
//fails: BeesException: Method must use the override keyword: void setMessage(String)

nosuper.cls

public class BeesException extends Exception{
    public BeesException(String message, Boolean noop){
        this.setMessage(message);
    }
    public override void setMessage(String message){
        super.setMessage(message);
    }
}
//fails: Object has no superclass for super invocation

stringarg.cls

public class BeesException extends Exception{
    public BeesException(String message){
        this.setMessage(message);
    }
}
//fails: System exception constructor already defined: <Constructor>(String)

wat.cls

public virtual class AnException extends Exception{}

public class BeesException extends AnException{
    public BeesException(String message, Boolean noop){
        this.setMessage(message);
    }
    public override void setMessage(String message){
        super.setMessage(message);
    }
}
//works, but not how you'd think