public abstract class ManagerBase<T>
{
    protected HashMap<EntityPlayer, T> values = new HashMap<EntityPlayer, T>();
    public void setToPlayer(EntityPlayer p, T value)
    {
        values.put(p, value);
    }

    public T getFromPlayer(EntityPlayer p)
    {
        if(!values.containsKey(p))
        {
            setToPlayer(p, getDefoultValue());
        }
        return values.get(p);
    }

    protected abstract T getDefoultValue();
}