insert paired brace before the closing brace or punctuation in the custom file type

platform/lang-api/src/com/intellij/psi/CustomHighlighterTokenType.java

@@ -45,6 +45,7 @@ public interface CustomHighlighterTokenType {
   IElementType MULTI_LINE_COMMENT = new CustomElementType("MULTI_LINE_COMMENT");
   IElementType WHITESPACE = new CustomElementType("WHITESPACE");
   IElementType CHARACTER = new CustomElementType("CHARACTER");
+  IElementType PUNCTUATION = new CustomElementType("PUNCTUATION");
 
   IElementType L_BRACE = new CustomElementType("L_BRACE");
   IElementType R_BRACE = new CustomElementType("R_BRACE");

platform/lang-impl/src/com/intellij/ide/highlighter/custom/CustomFileTypeLexer.java

@@ -65,6 +65,7 @@ public final class CustomFileTypeLexer extends AbstractCustomLexer {
       tokenParsers.add(multilineCommentParser);
     }
     tokenParsers.add(numberParser);
+    tokenParsers.add(new PunctuationParser());
     if (hexNumberParser != null) {
       tokenParsers.add(hexNumberParser);
     }

platform/lang-impl/src/com/intellij/ide/highlighter/custom/impl/CustomFileTypeBraceMatcher.java

@@ -42,8 +42,10 @@ class CustomFileTypeBraceMatcher implements BraceMatcher {
   }
 
   public boolean isRBraceToken(HighlighterIterator iterator, CharSequence fileText, FileType fileType) {
-    final IElementType tokenType = iterator.getTokenType();
+    return isRBraceToken(iterator.getTokenType());
+  }
 
+  private static boolean isRBraceToken(IElementType tokenType) {
     return tokenType == CustomHighlighterTokenType.R_BRACKET ||
            tokenType == CustomHighlighterTokenType.R_PARENTH ||
            tokenType == CustomHighlighterTokenType.R_BRACE;
@@ -80,7 +82,9 @@ class CustomFileTypeBraceMatcher implements BraceMatcher {
   }
 
   public boolean isPairedBracesAllowedBeforeType(@NotNull final IElementType lbraceType, @Nullable final IElementType contextType) {
-    return contextType == CustomHighlighterTokenType.WHITESPACE;
+    return contextType == CustomHighlighterTokenType.PUNCTUATION ||
+           contextType == CustomHighlighterTokenType.WHITESPACE ||
+           isRBraceToken(contextType);
   }
 
   public int getCodeConstructStart(final PsiFile file, final int openingBraceOffset) {

platform/lang-impl/src/com/intellij/ide/highlighter/custom/tokens/PunctuationParser.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2000-2009 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.intellij.ide.highlighter.custom.tokens;
+
+import com.intellij.psi.CustomHighlighterTokenType;
+
+/**
+ * @author peter
+ */
+public class PunctuationParser extends BaseTokenParser {
+  @Override
+  public boolean hasToken(int position) {
+    final char c = myBuffer.charAt(position);
+    if (".,:;".indexOf(c) >= 0) {
+      myTokenInfo.updateData(position, position+1, CustomHighlighterTokenType.PUNCTUATION);
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public int getSmartUpdateShift() {
+    return 0;
+  }
+}