Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3567
@StephanEwen It enforeces the following rules:
* every files has to end with a new-line
* no trailing whitespace *anywhere*
* every public/protected method/class must have a javadoc
* imports have to be sorted alphabetically
* static imports must come first
* whitespace after commas, semicolons and casts
* whitespace around operators, if, for, etc.
* left curly brace (`{`) must not be at the start of the line
```
public MyObject(int a)
{
=>
public MyObject(int a) {
```
* else/catch/finally must be on the same line as the right curly brace (`}`)
```
if {
}
else
=>
if {
} else
```
* static final variables must be upper case
* non-static variables must not be upper case
```
```
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