fix javadoc warnings in 'hibernate-core'

Description

When I ran './gradlew :hibernate-core:javadoc', there are bunch of warnings (like invalid reference, missing return type, etc.). It would be great to fix all of them.

Environment

None

Assignee

Nathan Xu

Reporter

Nathan Xu

Fix versions

Labels

backPortable

None

Suitable for new contributors

Yes, likely

Requires Release Note

None

backportDecision

None

Components

Affects versions

Priority

Minor
Configure