Created attachment 32146 [details] WorkbookUtil.java patch 1) org.apache.poi.ss.util.WorkbookUtil.validateSheetName and validateSheetState throw java.lang.IllegalArgumentExceptions but don't declare them in the throws clause. 2) validateSheetState is missing JavaDocs
More or less applied with r1634412 I prefer to use javadoc instead of the throws expression to document runtime exceptions. see http://stackoverflow.com/questions/16757066/javadoc-and-runtimeexception