Added Jackson dependency.

build.gradle

@@ -15,6 +15,7 @@ dependencies {
     compile 'ch.qos.logback:logback-classic:1.1.2'
 	compile 'com.jdbernard:jdb-util:3.5'
 	compile 'commons-codec:commons-codec:1.10'
+    compile 'com.fasterxml.jackson.core:jackson-databind:2.4.4'
 
     testCompile 'junit:junit:4.12'
 }

src/main/groovy/com/jdblabs/file/TreeDiff.groovy

@@ -3,16 +3,21 @@ package com.jdblabs.file
 import groovy.io.FileType
 import com.jdbernard.util.LightOptionParser
 import org.apache.commons.codec.digest.DigestUtils
+import com.fasterxml.jackson.databind.ObjectMapper
 
 public class TreeDiff {
 
     public static final String VERSION = "alpha.0";
 
+    private ObjectMapper objectMapper 
+
     public static void main(String[] args) {
 
         def cli = [
             'h': [longName: 'help'],
-            'v': [longName: 'version']
+            'v': [longName: 'version']/*,
+            'i': [longName: 'analysis-in'],
+            'o': [longName: 'analysis-out']*/
         ]
 
         def opts = LightOptionParser.parseOptions(cli, args)