fixes javadoc issues

Author: stevehu

src/main/java/com/networknt/schema/JsonSchema.java

@@ -57,8 +57,8 @@ public class JsonSchema extends BaseJsonValidator {
     /**
      * Find the schema node for $ref attribute.
      *
-     * @param ref
-     * @return
+     * @param ref String
+     * @return JsonNode
      */
     public JsonNode getRefSchemaNode(String ref) {
         JsonSchema schema = findAncestor();

src/main/java/com/networknt/schema/ValidatorTypeCode.java

@@ -25,9 +25,9 @@ public enum ValidatorTypeCode {
             "{0}.{1}: is not defined in the schema and the schema does not allow additional properties")),
     ALL_OF("allOf", "1002", new MessageFormat("{0}: should be valid to all the schemas {1}")),
     ANY_OF("anyOf", "1003", new MessageFormat("{0}: should be valid to any of the schemas {1}")),
-    CROSS_EDITS("crossEdits", "", new MessageFormat("{0}: has some error with 'cross edits'")),
-    DEPENDENCIES("dependencies", "1007", new MessageFormat("{0}: has some error with dependencies {1}")),
-    EDITS("edits", "", new MessageFormat("{0}: has some error with 'edits'")),
+    CROSS_EDITS("crossEdits", "", new MessageFormat("{0}: has an error with 'cross edits'")),
+    DEPENDENCIES("dependencies", "1007", new MessageFormat("{0}: has an error with dependencies {1}")),
+    EDITS("edits", "", new MessageFormat("{0}: has an error with 'edits'")),
     ENUM("enum", "1008", new MessageFormat("{0}: does not have a value in the enumeration {1}")),
     FORMAT("format", "1009", new MessageFormat("{0}: does not match the {1} pattern {2}")),
     ITEMS("items", "1010", new MessageFormat("{0}[{1}]: no validator found at this index")),
@@ -45,9 +45,9 @@ public enum ValidatorTypeCode {
     ONE_OF("oneOf", "1022", new MessageFormat("{0}: should be valid to one and only one of the schemas {1}")),
     PATTERN_PROPERTIES("patternProperties", "1024", new MessageFormat("{0}: has some error with 'pattern properties'")),
     PATTERN("pattern", "1023", new MessageFormat("{0}: does not match the regex pattern {1}")),
-    PROPERTIES("properties", "1025", new MessageFormat("{0}: has some error with 'properties'")),
+    PROPERTIES("properties", "1025", new MessageFormat("{0}: has an error with 'properties'")),
     READ_ONLY("readOnly", "1032", new MessageFormat("{0}: is a readonly field, it cannot be changed")),
-    REF("ref", "1026", new MessageFormat("{0}: has some error with 'refs'")),
+    REF("ref", "1026", new MessageFormat("{0}: has an error with 'refs'")),
     REQUIRED("required", "1028", new MessageFormat("{0}.{1}: is missing but it is required")),
     TYPE("type", "1029", new MessageFormat("{0}: {1} found, {2} expected")),
     UNION_TYPE("unionType", "1030", new MessageFormat("{0}: {1} found, but {2} is required")),