Do not call convert method again, because it is already called at the
onEnable() method.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Improve convert method with ETA and no-double run check.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Do not allow check to be more than once.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Remove internal javadocs.

Signed-off-by: Staartvin <mijnleraar@msn.com>