add joda time support to generator

Does this look like a reasonable way to add support for joda time to the generator? Tests are currently failing:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project mybatis-generator-systests-mybatis3: Compilation failure: Compilation failure:
[ERROR] /home/ben/Documents/new_src/generator/core/mybatis-generator-systests-mybatis3/target/generated-sources/mybatis-generator/mbg/test/mb3/generated/annotated/miscellaneous/model/MyObject.java:[127,19] getLastname() in mbg.test.mb3.generated.annotated.miscellaneous.model.MyObject cannot override getLastname() in mbg.test.common.BaseClass
[ERROR] overridden method is final
[ERROR] /home/ben/Documents/new_src/generator/core/mybatis-generator-systests-mybatis3/target/generated-sources/mybatis-generator/mbg/test/mb3/generated/mixed/miscellaneous/model/MyObject.java:[127,19] getLastname() in mbg.test.mb3.generated.mixed.miscellaneous.model.MyObject cannot override getLastname() in mbg.test.common.BaseClass
[ERROR] overridden method is final
[ERROR] /home/ben/Documents/new_src/generator/core/mybatis-generator-systests-mybatis3/target/generated-sources/mybatis-generator/mbg/test/mb3/generated/miscellaneous/model/MyObject.java:[127,19] getLastname() in mbg.test.mb3.generated.miscellaneous.model.MyObject cannot override getLastname() in mbg.test.common.BaseClass
[ERROR] overridden method is final