protect against exception during construction.
protect against exception during construction.

Change-Id: Ied19ddc28dc8413a35ee7b7269cd6c6f22ca9a91

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