Index: maven-i18n-plugin/src/java/org/codelutin/i18n/plugin/ui/KeysModifier.java
diff -u maven-i18n-plugin/src/java/org/codelutin/i18n/plugin/ui/KeysModifier.java:1.3 maven-i18n-plugin/src/java/org/codelutin/i18n/plugin/ui/KeysModifier.java:1.4
--- maven-i18n-plugin/src/java/org/codelutin/i18n/plugin/ui/KeysModifier.java:1.3	Fri Nov  2 15:02:59 2007
+++ maven-i18n-plugin/src/java/org/codelutin/i18n/plugin/ui/KeysModifier.java	Fri Nov  2 15:20:04 2007
@@ -42,7 +42,7 @@
         this.patternLeft = patternLeft;
         this.patternRight = patternRight;
         
-        setLayout(new GridLayout(7, 2, 10, 10));
+        setLayout(new GridLayout(6, 2, 10, 10));
 
         Container pane = getContentPane();
         pane.add(new JLabel("--- File information ---"));
@@ -82,30 +82,32 @@
     }
 
     public void eventNextFile(File file) {
-        String content = "";
-        int region = 0;
+        if(!newKeys.isEmpty()) {
+            String content = "";
+            int region = 0;
 
-        try {
-            content = FileUtil.readAsString(file);
-        } catch (IOException e) {
-            throw new ParserException(e);
-        }
+            try {
+                content = FileUtil.readAsString(file);
+            } catch (IOException e) {
+                throw new ParserException(e);
+            }
 
-        for (Iterator<String> iterator = newKeys.iterator(); iterator.hasNext();) {
-            String oldKey = iterator.next();
-            String realKey = iterator.next();
-            Pattern pattern = Pattern.compile("(" + patternLeft + ")(" + Pattern.quote(oldKey) + ")(" + patternRight + ")");
-            Matcher matcher = pattern.matcher(content);
-            matcher.region(region, content.length());
-            matcher.find();
-            region = matcher.start();
-            content = matcher.replaceFirst("$1" + realKey + "$3");
-        }
+            for (Iterator<String> iterator = newKeys.iterator(); iterator.hasNext();) {
+                String oldKey = iterator.next();
+                String realKey = iterator.next();
+                Pattern pattern = Pattern.compile("(" + patternLeft + ")(" + Pattern.quote(oldKey) + ")(" + patternRight + ")");
+                Matcher matcher = pattern.matcher(content);
+                matcher.region(region, content.length());
+                matcher.find();
+                region = matcher.start();
+                content = matcher.replaceFirst("$1" + realKey + "$3");
+            }
 
-        try {
-            FileUtil.writeString(file, content);
-        } catch (IOException e) {
-            throw new ParserException(e);
+            try {
+                FileUtil.writeString(file, content);
+            } catch (IOException e) {
+                throw new ParserException(e);
+            }
         }
     }