Add throwable to a couple of more CacheException subclasses

Exceptions are recommended to have constructors that accept a cause.
Note that cause is a Throwable, not an Exception.

Target: trunk
Require-notes: no
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/5433/

Author: gbehrmann

modules/dcache/src/main/java/diskCacheV111/util/CacheException.java

@@ -155,7 +155,7 @@ public CacheException(String message)
      *         permitted, and indicates that the cause is nonexistent or
      *         unknown.)
      */
-    public CacheException(String message, Exception cause)
+    public CacheException(String message, Throwable cause)
     {
         this(DEFAULT_ERROR_CODE, message, cause);
     }
@@ -183,7 +183,7 @@ public CacheException(int rc, String message)
      *         permitted, and indicates that the cause is nonexistent or
      *         unknown.)
      */
-    public CacheException(int rc, String message, Exception cause)
+    public CacheException(int rc, String message, Throwable cause)
     {
         super(formatMessage(message), cause);
         _message = getMessage();

modules/dcache/src/main/java/diskCacheV111/util/FileInCacheException.java

@@ -5,6 +5,10 @@ public class FileInCacheException extends CacheException {
     private static final long serialVersionUID = -2554947305070917562L;
 
     public FileInCacheException( String msg ){
-       super( CacheException.FILE_IN_CACHE , msg ) ;
+       super(FILE_IN_CACHE, msg);
+    }
+
+    public FileInCacheException(String msg, Throwable cause) {
+        super(FILE_IN_CACHE, msg, cause);
     }
 }

modules/dcache/src/main/java/diskCacheV111/util/FileNotInCacheException.java

@@ -5,6 +5,10 @@ public class FileNotInCacheException extends CacheException {
     private static final long serialVersionUID = 7790043638464132679L;
 
      public FileNotInCacheException( String msg ){
-        super( CacheException.FILE_NOT_IN_REPOSITORY , msg ) ;
+        super(FILE_NOT_IN_REPOSITORY, msg);
      }
+
+    public FileNotInCacheException(String msg, Throwable cause) {
+        super(FILE_NOT_IN_REPOSITORY, msg, cause);
+    }
 }