Javadoc - thread safety

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@759355 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveEntry.java b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveEntry.java
index 8ec96eb..6a0a013 100644
--- a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveEntry.java
+++ b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveEntry.java
@@ -22,6 +22,8 @@
 
 /**
  * Represents an archive entry in the "ar" format.
+ * 
+ * @Immutable
  */
 public class ArArchiveEntry implements ArchiveEntry {
 
diff --git a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveInputStream.java b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveInputStream.java
index 338d5d9..f0369b1 100644
--- a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveInputStream.java
+++ b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveInputStream.java
@@ -25,7 +25,10 @@
 import org.apache.commons.compress.archivers.ArchiveInputStream;
 
 /**
- * Implements the "ar" archive format as an input stream
+ * Implements the "ar" archive format as an input stream.
+ * 
+ * This class is thread-safe if the InputStream is thread-safe.
+ * 
  */
 public class ArArchiveInputStream extends ArchiveInputStream {
 
diff --git a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveOutputStream.java b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveOutputStream.java
index c4c0a38..b645908 100644
--- a/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveOutputStream.java
+++ b/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveOutputStream.java
@@ -25,7 +25,9 @@
 import org.apache.commons.compress.archivers.ArchiveOutputStream;
 
 /**
- * Implements the "ar" archive format as an output stream
+ * Implements the "ar" archive format as an output stream.
+ * 
+ * @NotThreadSafe
  */
 public class ArArchiveOutputStream extends ArchiveOutputStream {