java.io.IOException: Write error
        at java.io.FileOutputStream.writeBytes(Native Method)
        at java.io.FileOutputStream.write(FileOutputStream.java:247)
        at org.apache.poi.poifs.storage.BigBlock.doWriteData(BigBlock.java:54)
        at org.apache.poi.poifs.storage.HeaderBlockWriter.writeData(HeaderBlockWriter.java:213)
        at org.apache.poi.poifs.storage.BigBlock.writeBlocks(BigBlock.java:85)
        at org.apache.poi.poifs.filesystem.POIFSFileSystem.writeFilesystem(POIFSFileSystem.java:262)
        at org.apache.poi.hssf.usermodel.HSSFWorkbook.write(HSSFWorkbook.java:885)
        at javaapplication5.Storage.close(Storage.java:78)
        at javaapplication5.Crawler.<init>(Crawler.java:47)
        at javaapplication5.Main.init(Main.java:100)
        at sun.applet.AppletPanel.run(AppletPanel.java:378)
        at java.lang.Thread.run(Thread.java:595)