Added bunch of javadocs and restricted some visibility.

No functional changes

src/main/java/org/scribe/services/HMACSha1SignatureService.java

@@ -7,15 +7,23 @@ import org.apache.commons.codec.binary.*;
 import org.scribe.exceptions.*;
 import org.scribe.utils.*;
 
+/**
+ * HMAC-SHA1 implementation of {@SignatureService}
+ * 
+ * @author Pablo Fernandez
+ *
+ */
 public class HMACSha1SignatureService implements SignatureService
 {
-
   private static final String EMPTY_STRING = "";
   private static final String CARRIAGE_RETURN = "\r\n";
   private static final String UTF8 = "UTF-8";
   private static final String HMAC_SHA1 = "HmacSHA1";
   private static final String METHOD = "HMAC-SHA1";
 
+  /**
+   * {@inheritDoc}
+   */
   public String getSignature(String baseString, String apiSecret, String tokenSecret)
   {
     try
@@ -39,6 +47,9 @@ public class HMACSha1SignatureService implements SignatureService
     return new String(Base64.encodeBase64(bytes)).replace(CARRIAGE_RETURN, EMPTY_STRING);
   }
 
+  /**
+   * {@inheritDoc}
+   */
   public String getSignatureMethod()
   {
     return METHOD;