Fix javadoc errors caused by missing tags for declared exceptions

Change-Id: I587aae0ad217ed092f061682ffa66c724f221096
Signed-off-by: Tomasz Zarna <tomasz.zarna@tasktop.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java

@@ -136,6 +136,7 @@ public class RepoCommand extends GitCommand<RevCommit> {
 		 * @param ref
 		 *            The ref (branch/tag/etc.) to read
 		 * @return the sha1 of the remote repository
+		 * @throws GitAPIException
 		 */
 		public ObjectId sha1(String uri, String ref) throws GitAPIException;
 
@@ -149,6 +150,8 @@ public class RepoCommand extends GitCommand<RevCommit> {
 		 * @param path
 		 *            The relative path (inside the repo) to the file to read
 		 * @return the file content.
+		 * @throws GitAPIException
+		 * @throws IOException
 		 */
 		public byte[] readFile(String uri, String ref, String path)
 				throws GitAPIException, IOException;