Make it exception safe.
Make it exception safe.

Change-Id: Ib9b734ac9800b1ecf005dcd3a66beac6fcfc3a4f

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core