polish: refining few classes.

Author: vasantteja

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/data/ExponentialHistogramPointData.java

@@ -27,9 +27,9 @@
 public interface ExponentialHistogramPointData extends PointData {
 
   /**
-   * Create a DoubleExponentialHistogramPointData.
+   * Create a ExponentialHistogramPointData.
    *
-   * @return a DoubleExponentialHistogramPointData.
+   * @return a ExponentialHistogramPointData.
    */
   @SuppressWarnings("TooManyParameters")
   static ExponentialHistogramPointData create(

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/data/GaugeData.java

@@ -18,13 +18,13 @@
 public interface GaugeData<T extends PointData> extends Data<T> {
 
   /**
-   * Creates an instance of {@link ImmutableGaugeData} with the given collection of points.
+   * Creates an instance of {@link GaugeData} with the given collection of points.
    *
    * @param <T> the type of the point data
    * @param points the collection of points to be included in the gauge data
    * @return an instance of {@link ImmutableGaugeData} containing the provided points
    */
-  static <T extends PointData> ImmutableGaugeData<T> create(Collection<T> points) {
+  static <T extends PointData> GaugeData<T> create(Collection<T> points) {
     return ImmutableGaugeData.create(points);
   }
 }

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/data/LongExemplarData.java

@@ -27,7 +27,7 @@ public interface LongExemplarData extends ExemplarData {
    * @param spanContext The associated span context.
    * @param value The value recorded.
    */
-  public static LongExemplarData create(
+  static LongExemplarData create(
       Attributes filteredAttributes, long recordTimeNanos, SpanContext spanContext, long value) {
     return ImmutableLongExemplarData.create(
         filteredAttributes, recordTimeNanos, spanContext, value);

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/data/LongPointData.java

@@ -27,7 +27,7 @@ public interface LongPointData extends PointData {
    * @param attributes The set of attributes associated with this point.
    * @param value The value that was sampled.
    */
-  public static LongPointData create(
+  static LongPointData create(
       long startEpochNanos, long epochNanos, Attributes attributes, long value) {
     return ImmutableLongPointData.create(
         startEpochNanos, epochNanos, attributes, value, Collections.emptyList());

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/data/SummaryPointData.java

@@ -29,7 +29,7 @@ public interface SummaryPointData extends PointData {
    * @param sum The sum of measuremnts being sumarized.
    * @param percentileValues Calculations of percentile values from measurements.
    */
-  static ImmutableSummaryPointData create(
+  static SummaryPointData create(
       long startEpochNanos,
       long epochNanos,
       Attributes attributes,