Switch to calling Files.newBufferedReader

These changes were suggested by Extra Hints for NetBeans IDE:
http://plugins.netbeans.org/plugin/73447/

core/src/main/java/hudson/Util.java

@@ -193,7 +193,7 @@ public class Util {
 
         StringBuilder str = new StringBuilder((int)logfile.length());
 
-        try (BufferedReader r = new BufferedReader(new InputStreamReader(Files.newInputStream(logfile.toPath()), charset))) {
+        try (BufferedReader r = Files.newBufferedReader(logfile.toPath(), charset)) {
             char[] buf = new char[1024];
             int len;
             while ((len = r.read(buf, 0, buf.length)) > 0)

core/src/main/java/hudson/model/Queue.java

@@ -76,8 +76,8 @@ import hudson.util.ConsistentHash.Hash;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStreamReader;
 import java.lang.ref.WeakReference;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
@@ -377,7 +377,7 @@ public class Queue extends ResourceController implements Saveable {
             // first try the old format
             File queueFile = getQueueFile();
             if (queueFile.exists()) {
-                try (BufferedReader in = new BufferedReader(new InputStreamReader(Files.newInputStream(queueFile.toPath())))) {
+                try (BufferedReader in = Files.newBufferedReader(queueFile.toPath(), Charset.defaultCharset())) {
                     String line;
                     while ((line = in.readLine()) != null) {
                         AbstractProject j = Jenkins.getInstance().getItemByFullName(line, AbstractProject.class);

core/src/main/java/hudson/util/TextFile.java

@@ -38,6 +38,7 @@ import java.io.RandomAccessFile;
 import java.io.Reader;
 import java.io.StringWriter;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Iterator;
 
 /**
@@ -68,7 +69,7 @@ public class TextFile {
     public String read() throws IOException {
         StringWriter out = new StringWriter();
         PrintWriter w = new PrintWriter(out);
-        try (BufferedReader in = new BufferedReader(new InputStreamReader(Files.newInputStream(file.toPath()), "UTF-8"))) {
+        try (BufferedReader in = Files.newBufferedReader(file.toPath(), StandardCharsets.UTF_8)) {
             String line;
             while ((line = in.readLine()) != null)
                 w.println(line);