close xml FileOutputStreams after writing

pom.xml

@@ -8,7 +8,7 @@
 		<version>5.0</version> <relativePath /> </parent> -->
 	<groupId>embl.almf</groupId>
 	<artifactId>AutoMicTools_</artifactId>
-	<version>1.1.28-SNAPSHOT</version>
+	<version>1.1.29-SNAPSHOT</version>
 
 	<name>plugins/AutoMicTools_.jar</name>
 	<description>Collection of tools for automated (feedback) microscopy data acquisition and analysis</description>

src/main/java/automic/postaq/pipeline/xml/PipelineXMLWriter.java

@@ -103,12 +103,14 @@ public class PipelineXMLWriter {
 		
 		DOMSource source = new DOMSource(_document);
         
-		StreamResult result = new StreamResult(new FileOutputStream(targetFile));
+		FileOutputStream fos = new FileOutputStream(targetFile);
+		StreamResult result = new StreamResult(fos);
 		transformer.transform(source, result);
 		// Output to console for testing
         StreamResult consoleResult =	new StreamResult(System.out);
         transformer.transform(source, consoleResult);
-		
+        
+        fos.close();
 	}
 	
 	public void writePipelineToFile(PipelineInterface _pipeline, File _file)throws Exception{