trace

diff --git a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/DiffTraces.java b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/DiffTraces.java
index 6815f4b..365de33 100644
--- a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/DiffTraces.java
+++ b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/DiffTraces.java
@@ -23,7 +23,7 @@ import java.util.stream.Stream;
  */
 public class DiffTraces {
 
-    private static final Logger logger = Logger.getLogger(DiffTraces.class.getName());
+    private static final Logger LOGGER = Logger.getLogger(DiffTraces.class.getName());
 
     public static void diff(String firstPath, String secondPath) {
         try {
@@ -61,13 +61,13 @@ public class DiffTraces {
                     }
                 } catch (JsonSyntaxException e) {
                     truncate(lineFirst);
-                    logger.log(Level.INFO, "Malformed Trace {0}: {1}", new java.lang.Object[]{index, lineFirst});
+                    LOGGER.log(Level.INFO, "Malformed Trace {0}: {1}", new java.lang.Object[]{index, lineFirst});
                 } finally {
                     index++;
                 }
             }
         } catch (IOException ex) {
-            logger.log(Level.SEVERE, null, ex);
+            LOGGER.log(Level.SEVERE, null, ex);
         }
     }
 

diff --git a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/HashFile.java b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/HashFile.java
index 4245db3..6c4646c 100644
--- a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/HashFile.java
+++ b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/HashFile.java
@@ -31,11 +31,11 @@ import java.util.stream.Stream;
  */
 public class HashFile {
 
-    private static final Logger logger = Logger.getLogger(HashFile.class.getName());
+    private static final Logger LOGGER = Logger.getLogger(HashFile.class.getName());
 
     public static void convert(String inputPath, String outputPath) {
         try {
-            logger.log(Level.INFO, "Converting {0} traces", TraceReader.getLineCount(inputPath));
+            LOGGER.log(Level.INFO, "Converting {0} traces", TraceReader.getLineCount(inputPath));
             Stream<String> lines = Files.lines(Paths.get(inputPath));
             FileWriter fileWriter = new FileWriter(outputPath, true);
             lines.forEach(new Consumer<String>() {
@@ -78,7 +78,7 @@ public class HashFile {
                         if (line.length() > 2000) {
                             line = line.substring(0, 2000);
                         }
-                        logger.log(Level.INFO, "Malformed Trace {0}: {1}", new java.lang.Object[]{index, line});
+                        LOGGER.log(Level.INFO, "Malformed Trace {0}: {1}", new java.lang.Object[]{index, line});
                     } catch (IOException ex) {
                         Logger.getLogger(HashFile.class.getName()).log(Level.SEVERE, null, ex);
                     } finally {
@@ -87,7 +87,7 @@ public class HashFile {
                 }
             });
         } catch (IOException ex) {
-            logger.log(Level.SEVERE, null, ex);
+            LOGGER.log(Level.SEVERE, null, ex);
         }
     }
 }

diff --git a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/Main.java b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/Main.java
index 337257d..c1f0b9a 100644
--- a/src/main/java/br/ufrgs/inf/prosoft/trace/tools/Main.java
+++ b/src/main/java/br/ufrgs/inf/prosoft/trace/tools/Main.java
@@ -5,16 +5,12 @@
  */
 package br.ufrgs.inf.prosoft.trace.tools;
 
-import java.util.logging.Logger;
-
 /**
  *
  * @author romulo
  */
 public class Main {
 
-    private static final Logger logger = Logger.getLogger(Main.class.getName());
-
     public static void main(String[] args) {
         System.setProperty("java.util.logging.SimpleFormatter.format", "[%1$tF %1$tT+%1$tL] [%4$-7s] [Trace] %5$s %n");
         String tool = null;