Added Test Case here

https://github.com/guptasujeet/hibernate-test-case-templates/commit/a41eb90526cdc8126f5a57d4289b6bbd4762adeb

Table Created (notice not null, when optional = false)
===========

1) optional = true, nullable = true
-----------------------------------
@ManyToOne(fetch = FetchType.LAZY, optional = true)
@JoinColumn(name = "user_id", nullable = true)
private UserProfile userProfile;

create table UserContact (
contactId bigint not null,
name varchar(255),
user_id bigint,
primary key (contactId)
)

2) optional = false, nullable = true
-----------------------------------
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "user_id", nullable = true)
private UserProfile userProfile;

create table UserContact (
contactId bigint not null,
name varchar(255),
user_id bigint not null,
primary key (contactId)
)