Check if file exists before attempting to overwrite it

Fixes: openrewrite#3267

rewrite-java/src/main/java/org/openrewrite/java/JavaParser.java

@@ -37,10 +37,7 @@
 import java.lang.reflect.Method;
 import java.net.URI;
 import java.nio.charset.Charset;
-import java.nio.file.FileAlreadyExistsException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
+import java.nio.file.*;
 import java.util.*;
 import java.util.function.Function;
 import java.util.regex.Matcher;
@@ -172,14 +169,14 @@ static List<Path> dependenciesFromResources(ExecutionContext ctx, String... arti
  if (jarPattern.matcher(resource.getPath()).find()) {
  try {
  Path artifact = resourceTarget.toPath().resolve(Paths.get(resource.getPath()).getFileName());
-
- Files.copy(
- requireNonNull(caller.getResourceAsStream("/" + resource.getPath())),
- artifact
- );
+ if (!Files.exists(artifact)) {
+ Files.copy(
+ requireNonNull(caller.getResourceAsStream("/" + resource.getPath())),
+ artifact
+ );
+ }
  missingArtifactNames.remove(artifactName);
  artifacts.add(artifact);
- } catch (FileAlreadyExistsException ignore) {
  } catch (IOException e) {
  throw new UncheckedIOException(e);
  }