package sqlancer.common;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public final class DBMSCommon {

    private static final Pattern SQLANCER_INDEX_PATTERN = Pattern.compile("^i\\d+");

    private DBMSCommon() {
    }

    public static String createTableName(int nr) {
        return String.format("t%d", nr);
    }

    public static String createColumnName(int nr) {
        return String.format("c%d", nr);
    }

    public static String createIndexName(int nr) {
        return String.format("i%d", nr);
    }

    public static boolean matchesIndexName(String indexName) {
        Matcher matcher = SQLANCER_INDEX_PATTERN.matcher(indexName);
        return matcher.matches();
    }

}

package sqlancer.common;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public final class DBMSCommon {

    private static final Pattern sqlancerIndexPattern = Pattern.compile("^i\\d+");

    private DBMSCommon() {
    }

    public static String createTableName(int nr) {
        return String.format("t%d", nr);
    }

    public static String createColumnName(int nr) {
        return String.format("c%d", nr);
    }

    public static String createIndexName(int nr) {
        return String.format("i%d", nr);
    }

    public static boolean matchesIndexName(String indexName) {
        Matcher matcher = sqlancerIndexPattern.matcher(indexName);
        return matcher.matches();
    }

}

--- 
+++ 
@@ -5,7 +5,7 @@
 
 public final class DBMSCommon {
 
-    private static final Pattern sqlancerIndexPattern = Pattern.compile("^i\\d+");
+    private static final Pattern SQLANCER_INDEX_PATTERN = Pattern.compile("^i\\d+");
 
     private DBMSCommon() {
     }
@@ -23,7 +23,7 @@
     }
 
     public static boolean matchesIndexName(String indexName) {
-        Matcher matcher = sqlancerIndexPattern.matcher(indexName);
+        Matcher matcher = SQLANCER_INDEX_PATTERN.matcher(indexName);
         return matcher.matches();
     }
 
Use Java naming conventions for constants
