diff --git a/.gitignore b/.gitignore
index 9a1b12b..61a782f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ OUTPUT/
 *.csv
 *.pdf
 Dataset/
+GumTreeInput/
+*TestParser.java
 src/main/java/edu/lu/uni/serval/FixPatternParser/TestParser.java
 # Package Files #
 *.jar
diff --git a/src/main/java/edu/lu/uni/serval/FixPatternMining/App/Step13.java b/src/main/java/edu/lu/uni/serval/FixPatternMining/App/Step13.java
index 67e7a29..c891ea4 100644
--- a/src/main/java/edu/lu/uni/serval/FixPatternMining/App/Step13.java
+++ b/src/main/java/edu/lu/uni/serval/FixPatternMining/App/Step13.java
@@ -3,7 +3,6 @@ package edu.lu.uni.serval.FixPatternMining.App;
 import java.io.File;
 import java.util.List;
 
-import edu.lu.uni.serval.FixPatternMining.FeatureLearner;
 import edu.lu.uni.serval.config.Configuration;
 import edu.lu.uni.serval.utils.FileHelper;
 
@@ -18,6 +17,7 @@ public class Step13 {
 	public static void main(String[] args) {
 		boolean isSupervisedLearning = true;
 		if (isSupervisedLearning) {// supervised learning
+			// localization file, feature file, 
 			// label --> possibility --> 90, 80, 70, 60 others ignored, level one localization
 			// label: clusterNum, re-compute similarity with each element. 90, 80, 70, 60.
 			// similarity: patches --> fixing bug.
diff --git a/src/main/java/edu/lu/uni/serval/FixPatternParser/Parser.java b/src/main/java/edu/lu/uni/serval/FixPatternParser/Parser.java
index 3755321..34dad85 100644
--- a/src/main/java/edu/lu/uni/serval/FixPatternParser/Parser.java
+++ b/src/main/java/edu/lu/uni/serval/FixPatternParser/Parser.java
@@ -2,7 +2,6 @@ package edu.lu.uni.serval.FixPatternParser;
 
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.StringReader;
 import java.util.ArrayList;
@@ -39,7 +38,7 @@ public class Parser {
 	private String originalTree = ""; 		// Guide of generating patches.
 	private String actionSets = ""; 		// Guide of generating patches.
 
-	public void parseFixPatterns(File prevFile, File revFile, File diffEntryFile) throws FileNotFoundException, IOException {
+	public void parseFixPatterns(File prevFile, File revFile, File diffEntryFile) {
 		
 		// GumTree results
 		List<Action> gumTreeResults = new GumTreeComparer().compareTwoFilesWithGumTree(prevFile, revFile);
diff --git a/src/main/java/edu/lu/uni/serval/FixPatternParser/TestParser.java b/src/main/java/edu/lu/uni/serval/FixPatternParser/TestParser.java
index a86ce25..b4cc7ee 100644
--- a/src/main/java/edu/lu/uni/serval/FixPatternParser/TestParser.java
+++ b/src/main/java/edu/lu/uni/serval/FixPatternParser/TestParser.java
@@ -1,8 +1,6 @@
 package edu.lu.uni.serval.FixPatternParser;
 
 import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.IOException;
 
 import edu.lu.uni.serval.utils.FileHelper;
 
@@ -43,21 +41,15 @@ public class TestParser {
 					
 					SingleStatementParser parser = new SingleStatementParser();
 //					HunkParser parser = new HunkParser();
-					try {
-						parser.parseFixPatterns(prevFile, revFile, diffentryFile);
-						
-						astEditScripts.append(parser.getAstEditScripts());
-						originalTrees.append(parser.getOriginalTree());
-						buggyTrees.append(parser.getBuggyTrees());
-						actionSets.append(parser.getActionSets());
-						tokens.append(parser.getTokensOfSourceCode());
-						sizes.append(parser.getSizes());
-						patches.append(parser.getPatchesSourceCode());
-					} catch (FileNotFoundException e) {
-						e.printStackTrace();
-					} catch (IOException e) {
-						e.printStackTrace();
-					}
+					parser.parseFixPatterns(prevFile, revFile, diffentryFile);
+					
+					astEditScripts.append(parser.getAstEditScripts());
+					originalTrees.append(parser.getOriginalTree());
+					buggyTrees.append(parser.getBuggyTrees());
+					actionSets.append(parser.getActionSets());
+					tokens.append(parser.getTokensOfSourceCode());
+					sizes.append(parser.getSizes());
+					patches.append(parser.getPatchesSourceCode());
 				}
 			}
 //			break;