[wpilib] Prefix all NI DS specific controller classes (#8596)

Easier then the last one that put everything in a sub namespace. By
prefixing the name less things break, and intellisense will be less
confusing to new users during the transition.

wpilibjExamples/src/main/java/org/wpilib/examples/tankdrivegamepad/Main.java

@@ -0,0 +1,25 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package org.wpilib.examples.tankdrivegamepad;
+
+import org.wpilib.framework.RobotBase;
+
+/**
+ * Do NOT add any static variables to this class, or any initialization at all. Unless you know what
+ * you are doing, do not modify this file except to change the parameter class to the startRobot
+ * call.
+ */
+public final class Main {
+  private Main() {}
+
+  /**
+   * Main initialization function. Do not perform any initialization here.
+   *
+   * <p>If you change your main robot class, change the parameter type.
+   */
+  public static void main(String... args) {
+    RobotBase.startRobot(Robot::new);
+  }
+}

wpilibjExamples/src/main/java/org/wpilib/examples/tankdrivegamepad/Robot.java

@@ -0,0 +1,43 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package org.wpilib.examples.tankdrivegamepad;
+
+import org.wpilib.drive.DifferentialDrive;
+import org.wpilib.driverstation.Gamepad;
+import org.wpilib.framework.TimedRobot;
+import org.wpilib.hardware.motor.PWMSparkMax;
+import org.wpilib.util.sendable.SendableRegistry;
+
+/**
+ * This is a demo program showing the use of the DifferentialDrive class. Runs the motors with tank
+ * steering and a gamepad.
+ */
+public class Robot extends TimedRobot {
+  private final PWMSparkMax m_leftMotor = new PWMSparkMax(0);
+  private final PWMSparkMax m_rightMotor = new PWMSparkMax(1);
+  private final DifferentialDrive m_robotDrive =
+      new DifferentialDrive(m_leftMotor::set, m_rightMotor::set);
+  private final Gamepad m_driverController = new Gamepad(0);
+
+  /** Called once at the beginning of the robot program. */
+  public Robot() {
+    SendableRegistry.addChild(m_robotDrive, m_leftMotor);
+    SendableRegistry.addChild(m_robotDrive, m_rightMotor);
+
+    // We need to invert one side of the drivetrain so that positive voltages
+    // result in both sides moving forward. Depending on how your robot's
+    // gearbox is constructed, you might have to invert the left side instead.
+    m_rightMotor.setInverted(true);
+  }
+
+  @Override
+  public void teleopPeriodic() {
+    // Drive with tank drive.
+    // That means that the Y axis of the left stick moves the left side
+    // of the robot forward and backward, and the Y axis of the right stick
+    // moves the right side of the robot forward and backward.
+    m_robotDrive.tankDrive(-m_driverController.getLeftY(), -m_driverController.getRightY());
+  }
+}