U refactoring

Author: fvarrui

src/main/java/io/github/fvarrui/javapackager/model/MacConfig.java

@@ -1,6 +1,6 @@
 package io.github.fvarrui.javapackager.model;
 
-import static io.github.fvarrui.javapackager.utils.NumberUtils.defaultIfNull;
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
 
 import java.io.File;
 

src/main/java/io/github/fvarrui/javapackager/utils/JavaUtils.java

@@ -3,12 +3,10 @@
 public class JavaUtils {
 
 	public static int getJavaMajorVersion() {
-		String version = System.getProperty("java.version");
-		
-		int major = Integer.parseInt(version.split("\\.")[0]);
+		String [] version = System.getProperty("java.version").split("\\.");
+		int major = Integer.parseInt(version[0]);
 		if (major >= 2) return major;
-		
-		return Integer.parseInt(version.split("\\.")[1]);
+		return Integer.parseInt(version[1]);
 	}
 
 }

src/main/java/io/github/fvarrui/javapackager/utils/NumberUtils.java

@@ -17,6 +17,11 @@
 
 public class XMLUtils {
 
+	/**
+	 * Pretiffy an XML file
+	 * @param file Xml file
+	 * @throws MojoExecutionException Something went wrong
+	 */
 	public static final void prettify(File file) throws MojoExecutionException {
 		try {
 
@@ -39,6 +44,10 @@ public static final void prettify(File file) throws MojoExecutionException {
 		}
 	}
 
+	/**
+	 * Removes whitespaces from nodes
+	 * @param node Root node
+	 */
 	public static void trimWhitespace(Node node) {
 	    NodeList children = node.getChildNodes();
 	    for(int i = 0; i < children.getLength(); ++i) {