The Generated annoation is used to mark source code that has been generated.

  The Generated annoation is used to mark source code that has been generated.
It can also be used to differentiate user written code from generated code
in a single file. When used, the value element must have the name of the
code generator. The recommended convention is to use the fully qualified
name of the code generator in the value field .
For example: com.company.package.classname.
The date element is used to indicate the date the source was generated.
The date element must follow the ISO 8601 standard. For example the date
element would have the following value 2001-07-04T12:08:56.235-0700
which represents 2001-07-04 12:08:56 local time in the U.S. Pacific
Time time zone.
The comment element is a place holder for any comments that the code
generator may want to include in the generated code.