NullPointerException if output file is specified without parent path

[rsenden]

Caused by: java.lang.NullPointerException
	at com.fortify.vulnexport.spi.target.vuln.consumer.to.file.stream.MultiOutputStreamFactory$MultiOutputStream.createFileOutputStream(MultiOutputStreamFactory.java:88)
	at com.fortify.vulnexport.spi.target.vuln.consumer.to.file.stream.MultiOutputStreamFactory$MultiOutputStream.<init>(MultiOutputStreamFactory.java:79)
	at com.fortify.vulnexport.spi.target.vuln.consumer.to.file.stream.MultiOutputStreamFactory.createOutputStream(MultiOutputStreamFactory.java:53)

It seems like file.getParentFile() at

FortifyVulnerabilityExporter/FortifyVulnerabilityExporter-spi-to/src/main/java/com/fortify/vulnexport/spi/target/vuln/consumer/to/file/stream/MultiOutputStreamFactory.java

Line 87 in 4d8e14b

File dir = file.getParentFile();

may return null if a user specifies a simple file name (rather than fully qualified file path) as the output file. This causes an NPE in the next line when checking for directory existence:

FortifyVulnerabilityExporter/FortifyVulnerabilityExporter-spi-to/src/main/java/com/fortify/vulnexport/spi/target/vuln/consumer/to/file/stream/MultiOutputStreamFactory.java

Line 88 in 4d8e14b

if ( config.isMkdir() && !dir.exists() ) {