Add version class

.codegen.json

@@ -15,7 +15,7 @@
   "version": {
     "pom.xml": "<artifactId>databricks-sdk-parent</artifactId>\n  <version>$VERSION</version>",
     "databricks-sdk-java/pom.xml": "<artifactId>databricks-sdk-parent</artifactId>\n    <version>$VERSION</version>",
-    "databricks-sdk-java/src/main/java/com/databricks/sdk/core/UserAgent.java": "private static final String version = \"$VERSION\";"
+    "databricks-sdk-java/src/main/java/com/databricks/sdk/core/Version.java": "private static final String version = \"$VERSION\";"
   },
   "toolchain": {
     "require": ["mvn", "java"],

databricks-sdk-java/src/main/java/com/databricks/sdk/core/UserAgent.java

@@ -10,11 +10,6 @@ public class UserAgent {
 
   private static final Map<String, String> otherInfo = new HashMap<>();
 
-  // TODO: check if reading from
-  // /META-INF/maven/com.databricks/databrics-sdk-java/pom.properties
-  // or getClass().getPackage().getImplementationVersion() is enough.
-  private static final String version = "0.8.1";
-
   public static void withProduct(String product, String productVersion) {
     UserAgent.product = product;
     UserAgent.productVersion = productVersion;
@@ -49,6 +44,6 @@ public static String asString() {
             .collect(Collectors.joining());
     return String.format(
         "%s/%s databricks-sdk-java/%s jvm/%s os/%s%s",
-        product, productVersion, version, jvmVersion(), osName(), otherInfo);
+        product, productVersion, Version.sdkVersion(), jvmVersion(), osName(), otherInfo);
   }
 }

databricks-sdk-java/src/main/java/com/databricks/sdk/core/Version.java

@@ -0,0 +1,15 @@
+package com.databricks.sdk.core;
+
+public final class Version {
+
+  // TODO: check if reading from
+  // /META-INF/maven/com.databricks/databrics-sdk-java/pom.properties
+  // or getClass().getPackage().getImplementationVersion() is enough.
+  private static final String version = "0.8.1";
+
+  public static String sdkVersion() {
+    return version;
+  }
+
+  private Version() {}
+}