add @throws to JavaDoc, rather than to method signature

Author: Takayuki Otake

StudyplusAndroidSDK/src/main/java/jp/studyplus/android/sdk/service/api/StudyplusApi.java

@@ -11,7 +11,12 @@
  */
 public class StudyplusApi {
 
-	public static ApiClient getClient(Context context) throws AccessTokenNotFound {
+	/**
+	 * @param context Specifies application context.
+	 * @return client for StudyplusAPI
+	 * @throws AccessTokenNotFound
+	 */
+	public static ApiClient getClient(Context context) {
 		ApiCertification certification = CertificationStore.create(context).getDefault();
 		return new ApiClient(certification);
 	}

StudyplusAndroidSDK/src/main/java/jp/studyplus/android/sdk/service/auth/AuthTransit.java

@@ -25,8 +25,14 @@ public AuthTransit setRequestCode(int requestCode){
 		return new AuthTransit(activity, requestCode);
 	}
 
-	public void startActivity(String consumerKey, String consumerSecret)
-			throws ActivityNotFoundException {
+	/**
+	 * Start the certification {@link Activity} for API.
+	 *
+	 * @param consumerKey for API
+	 * @param consumerSecret for API
+	 * @throws ActivityNotFoundException when not installed Studyplus application or un-supported version.
+	 */
+	public void startActivity(String consumerKey, String consumerSecret) {
 		Intent intent = new Intent();
 		intent.setAction(Intent.ACTION_VIEW);
 		intent.putExtra("consumer_key", consumerKey);

StudyplusAndroidSDK/src/main/java/jp/studyplus/android/sdk/service/auth/CertificationStore.java

@@ -46,7 +46,13 @@ private Optional<String> findAccessToken(){
 		return Optional.fromNullable(preferences.getString(KEY_ACCESS_TOKEN, null));
 	}
 
-	public ApiCertification getDefault() throws AccessTokenNotFound {
+	/**
+	 * Return the basic {@link ApiCertification} instance for API.
+	 *
+	 * @return certification instance for API.
+	 * @throws AccessTokenNotFound
+	 */
+	public ApiCertification getDefault() {
 		Optional<String> token = findAccessToken();
 		if (!token.isPresent()){
 			throw new AccessTokenNotFound();