provide a finish method separate from close - merge from commons-compress, this time merging the correct revision

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@741618 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/bzip2/CBZip2OutputStream.java

@@ -381,6 +381,16 @@ public class CBZip2OutputStream extends OutputStream implements BZip2Constants {
         if (closed) {
             return;
         }
+        finish();
+        super.close();
+        bsStream.close();
+        closed = true;    	
+    }
+    
+    protected void finish() throws IOException {
+        if (closed) {
+            return;
+        }
 
         if (runLength > 0) {
             writeRun();
@@ -388,9 +398,6 @@ public class CBZip2OutputStream extends OutputStream implements BZip2Constants {
         currentChar = -1;
         endBlock();
         endCompression();
-        closed = true;
-        super.close();
-        bsStream.close();
     }
 
     public void flush() throws IOException {