Added comments.

src/main/java/io/cdap/plugin/servicenow/source/ServiceNowInputFormat.java

@@ -116,6 +116,12 @@ public List<InputSplit> getSplits(JobContext jobContext) {
     return getSplits(jobContext.getConfiguration());
   }
 
+  /**
+   * Get the split details based on the given Configuration.
+   *
+   * @param configuration Hadoop's configuration object
+   * @return List of InputSplits based on the tableInfo details from the Configuration object.
+   */
   public List<InputSplit> getSplits(Configuration configuration) {
     ServiceNowJobConfiguration jobConfig = new ServiceNowJobConfiguration(configuration);
     int pageSize = jobConfig.getPluginConf().getPageSize().intValue();

src/main/java/io/cdap/plugin/servicenow/source/ServiceNowRecordReader.java

@@ -56,6 +56,13 @@ public void initialize(InputSplit split, TaskAttemptContext context) {
     fetchSchema(restApi);
   }
 
+  /**
+   * Initialize with only the provided split.
+   * This method should not be called directly from the code,
+   * as Hadoop runtime initialize internally during execution.
+   *
+   * @param split Split to read by the current reader.
+   */
   public void initialize(InputSplit split) {
     initialize(split, null);
   }