Fix several minor javadoc issues

Author: oschwald

pom.xml

@@ -21,6 +21,9 @@
         <name>MaxMind, Inc.</name>
         <url>http://www.maxmind.com/</url>
     </organization>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
     <dependencies>
         <dependency>
             <groupId>com.maxmind.geoip2</groupId>
@@ -205,4 +208,4 @@
             </plugin>
         </plugins>
     </build>
-</project>
+</project>

src/main/java/com/maxmind/minfraud/WebServiceClient.java

@@ -170,7 +170,7 @@ public WebServiceClient build() {
      * Make a minFraud Insights request to the web service using the transaction
      * request object passed to the method.
      *
-     * @param request A transaction request object.
+     * @param transaction A transaction request object.
      * @return An Insights model object
      * @throws InsufficientFundsException when there are insufficient funds on
      *                                    the account.
@@ -193,7 +193,7 @@ public InsightsResponse insights(Transaction transaction) throws IOException,
      * Make a minFraud Score request to the web service using the transaction
      * request object passed to the method.
      *
-     * @param request A transaction request object.
+     * @param transaction A transaction request object.
      * @return An Score model object
      * @throws InsufficientFundsException when there are insufficient funds on
      *                                    the account.

src/main/java/com/maxmind/minfraud/exception/MinFraudException.java

@@ -4,7 +4,7 @@
  * This class represents a non-specific error with the web service.
  * Generally this will be thrown if the web service responds with an
  * expected status but unexpected content.
- * <p/>
+ *
  * It also serves as the base class for {@code AuthenticationException},
  * {@code InsufficientFundsException}, and {@code InvalidRequestException}.
  */
@@ -24,4 +24,4 @@ public MinFraudException(String message) {
     public MinFraudException(String message, Throwable e) {
         super(message, e);
     }
-}
+}

src/main/java/com/maxmind/minfraud/request/Transaction.java

@@ -247,6 +247,7 @@ public List<ShoppingCartItem> getShoppingCart() {
 
     /**
      * @return The transaction as JSON.
+     * @throws IOException when there is an issue encoding as JSON.
      */
     public String toJson() throws IOException {
         ObjectMapper mapper = new ObjectMapper();

src/main/java/com/maxmind/minfraud/response/Warning.java

@@ -14,7 +14,7 @@ public final class Warning {
     /**
      * This provides a machine-readable code identifying the warning. Although
      * more codes may be added in the future, the current codes are:
-     * <p/>
+     *
      * <ul>
      * <li>BILLING_CITY_NOT_FOUND – the billing city could not be found in
      * our database.</li>