more String->OUString and early bail outs
more String->OUString and early bail outs

Change-Id: Ia573f27962b5fbb48e543a2e2a802e85db36fafd

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