diff --git a/platform/util/src/com/intellij/util/PatternUtil.java b/platform/util/src/com/intellij/util/PatternUtil.java
index 18f6245c325c..8ef7e080c70a 100644
--- a/platform/util/src/com/intellij/util/PatternUtil.java
+++ b/platform/util/src/com/intellij/util/PatternUtil.java
@@ -18,6 +18,8 @@ package com.intellij.util;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.containers.HashMap;
+import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 import java.util.Map;
@@ -25,9 +27,6 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;
 
-import org.jetbrains.annotations.NonNls;
-import org.jetbrains.annotations.Nullable;
-
 public class PatternUtil {
   private static final Logger LOG = Logger.getInstance("#com.intellij.util.PatternUtil");
   private static final HashMap<String, String> ourEscapeRules = new HashMap<String, String>();
@@ -50,17 +49,17 @@ public class PatternUtil {
   }
 
   private static void escape2(char symbol) {
-    ourEscapeRules.put(""+symbol, "\\" + symbol);
+    ourEscapeRules.put(String.valueOf(symbol), "\\" + symbol);
   }
 
   public static String convertToRegex(String mask) {
-    List<String> strings = StringUtil.split(mask,"\\");
-    StringBuffer pattern = new StringBuffer();
+    List<String> strings = StringUtil.split(mask, "\\");
+    StringBuilder pattern = new StringBuilder();
     String separator = "";
 
-    for (String string:strings) {
+    for (String string : strings) {
       string = StringUtil.replace(string, ".", "\\.");
-      for (Map.Entry<String, String> e: ourEscapeRules.entrySet()) {
+      for (Map.Entry<String, String> e : ourEscapeRules.entrySet()) {
         string = StringUtil.replace(string, e.getKey(), e.getValue());
       }
       pattern.append(separator);