Manual cherry-pick unknown error fix

Issue:203613

Author: tomas-sexenian

gxoffice/src/main/java/com/genexus/gxoffice/poi/xssf/ExcelDocument.java

@@ -30,7 +30,9 @@ public short Open(String fileName) {
 			if (!template.equals("")) {
 				GXFile templateFile = new GXFile(template);
 				if (templateFile.exists()) {
-					workBook = new XSSFWorkbook(templateFile.getStream());
+					try (InputStream is = templateFile.getStream()) {
+						workBook = new XSSFWorkbook(is);
+					}
 				} else {
 					errCod = 4; // Invalid template
 					errDescription = "Invalid template.";
@@ -39,8 +41,9 @@ public short Open(String fileName) {
 			} else {
 				GXFile file = new GXFile("", fileName, Constants.EXTERNAL_UPLOAD_ACL, GxFileInfoSourceType.Unknown);
 				if (file.exists()) {
-					// System.out.println("Opening..");
-					workBook = new XSSFWorkbook(file.getStream());
+					try (InputStream is = file.getStream()) {
+						workBook = new XSSFWorkbook(is);
+					}
 				} else {
 					// System.out.println("Creating..");
 					workBook = new XSSFWorkbook();
@@ -316,4 +319,4 @@ public void setDateFormat(String dFormat) {
 	public String getDateFormat() {
 		return dateFormat;
 	}
-}
+}