[Java] Add checkstyle rule for copyright.

Author: mjpt777

config/checkstyle/checkstyle.xml

@@ -22,6 +22,11 @@
  <property name="ignorePattern" value="^[ \t]*\*.*@.*$"/>
  </module>
 
+ <module name="Header">
+ <property name="header" value="/*\n * Copyright 2013-2021 Real Logic Limited."/>
+ <property name="fileExtensions" value="java"/>
+ </module>
+
  <module name="TreeWalker">
  <property name="tabWidth" value="4"/>
  <property name="severity" value="error"/>

config/checkstyle/suppressions.xml

@@ -4,4 +4,5 @@
  "https://checkstyle.org/dtds/suppressions_1_0.dtd">
 <suppressions>
  <suppress files=".*generated-src.*" checks="."/>
+ <suppress files=".*generated.*" checks="."/>
 </suppressions>

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/csharp/CSharp.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2013-2021 Real Logic Limited.
  * Copyright 2017 MarketFactory Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/golang/GolangGenerator.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2013-2021 Real Logic Limited.
  * Copyright (C) 2016 MarketFactory, Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/golang/GolangOutputManager.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2013-2021 Real Logic Limited.
  * Copyright (C) 2016 MarketFactory, Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/golang/GolangUtil.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2013-2021 Real Logic Limited.
  * Copyright (C) 2016 MarketFactory, Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

sbe-tool/src/main/java/uk/co/real_logic/sbe/xml/IrGenerator.java

@@ -1,4 +1,5 @@
-/* Copyright 2013-2021 Real Logic Limited.
+/*
+ * Copyright 2013-2021 Real Logic Limited.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

sbe-tool/src/main/java/uk/co/real_logic/sbe/xml/ParserOptions.java

@@ -1,4 +1,3 @@
-/* -*- mode: java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil -*- */
 /*
  * Copyright 2013-2021 Real Logic Limited.
  *

sbe-tool/src/test/java/uk/co/real_logic/sbe/generation/csharp/Issue567GroupSizeTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2013-2021 Real Logic Limited.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package uk.co.real_logic.sbe.generation.csharp;
 
 import org.agrona.generation.StringWriterOutputManager;